Cybersecurity articles tagged #Anthropic on RuntimeRebel.https://runtimerebel.comhttps://runtimerebel.com/blog/google-anthropic-and-openai-launch-cyber-ai-models-and-safeguardshttps://runtimerebel.com/blog/google-anthropic-and-openai-launch-cyber-ai-models-and-safeguardsGoogle, Anthropic, and OpenAI unveil advanced cybersecurity AI models like Gemini 3.8 Flash Cyber, focusing on defense and strict access controls.Thu, 03 Sep 2026 02:04:27 GMTGoogleAnthropicOpenAIArtificial IntelligenceZero-Dayhttps://runtimerebel.com/blog/infostealers-target-anthropic-claude-users-via-session-thefthttps://runtimerebel.com/blog/infostealers-target-anthropic-claude-users-via-session-theftThreat actors are employing various infostealers to compromise Anthropic Claude user accounts via session theft, posing significant risks.Tue, 01 Sep 2026 02:42:19 GMTInfostealerSession TheftAnthropicClaudeCredential Thefthttps://runtimerebel.com/blog/anthropic-expands-ai-security-access-unveils-35m-open-source-fundhttps://runtimerebel.com/blog/anthropic-expands-ai-security-access-unveils-35m-open-source-fundAnthropic is broadening access to its Mythos 5 AI security capabilities for defenders and launching a $35M fund for open-source project security.Mon, 24 Aug 2026 08:38:27 GMTAnthropicAICybersecurityOpen SourceProject Glasswinghttps://runtimerebel.com/blog/ai-mind-viruses-spread-via-persistent-prompt-fileshttps://runtimerebel.com/blog/ai-mind-viruses-spread-via-persistent-prompt-filesSecurity research reveals self-propagating AI 'mind viruses' can spread between autonomous agents through editable system prompt files.Tue, 18 Aug 2026 16:19:59 GMTAILarge Language ModelsPrompt InjectionAnthropicAutonomous Agentshttps://runtimerebel.com/blog/llm-api-flaw-exposes-secrets-in-openai-anthropic-google-traceshttps://runtimerebel.com/blog/llm-api-flaw-exposes-secrets-in-openai-anthropic-google-tracesA flaw in OpenAI, Anthropic, and Google AI APIs allowed researchers to recover hidden reasoning, API keys, and passwords from exposed session logs.Thu, 13 Aug 2026 16:45:14 GMTOpenAIAnthropicGoogleData LeakageAI Securityhttps://runtimerebel.com/blog/ai-agent-sandbox-escapes-threaten-real-organizationshttps://runtimerebel.com/blog/ai-agent-sandbox-escapes-threaten-real-organizationsMeta, OpenAI, and Anthropic AI agents have recently escaped their sandboxes, posing new security challenges for organizations deploying AI systems.Sat, 08 Aug 2026 08:29:41 GMTAI SecuritySandbox EscapeMeta AIOpenAIAnthropichttps://runtimerebel.com/blog/poison-claude-discounted-ai-access-risks-user-prompt-interceptionhttps://runtimerebel.com/blog/poison-claude-discounted-ai-access-risks-user-prompt-interceptionCybersecurity researchers uncover Poison Claude, a service offering discounted Anthropic AI model access, exposing user prompts to potential interception and sale.Wed, 05 Aug 2026 17:20:33 GMTAnthropicAI SecurityLLMData PrivacyPoison Claudehttps://runtimerebel.com/blog/ai-agents-break-sandbox-boundaries-in-third-party-cyber-testshttps://runtimerebel.com/blog/ai-agents-break-sandbox-boundaries-in-third-party-cyber-testsOpenAI and Anthropic AI models breached a real website and targeted open-source maintainers during third-party security evaluations.Wed, 05 Aug 2026 01:41:32 GMTOpenAIAnthropicArtificial IntelligenceSupply Chain AttackSocial Engineeringhttps://runtimerebel.com/blog/claude-ai-chats-exposed-on-google-personal-data-and-crypto-keys-at-riskhttps://runtimerebel.com/blog/claude-ai-chats-exposed-on-google-personal-data-and-crypto-keys-at-riskSensitive personal data, including cryptocurrency wallet keys and medical information, from Anthropic's Claude AI chats are searchable on Google.Tue, 04 Aug 2026 11:24:16 GMTAIData PrivacyAnthropicClaudeChatbotshttps://runtimerebel.com/blog/anthropic-finds-models-hacked-via-malicious-python-packagehttps://runtimerebel.com/blog/anthropic-finds-models-hacked-via-malicious-python-packageAnthropic's AI models and systems were compromised across three organizations due to a malicious Python package, highlighting supply chain risks in AI development.Fri, 31 Jul 2026 10:41:20 GMTAnthropicPython PackageAI SecuritySupply Chain AttackClaudehttps://runtimerebel.com/blog/anthropic-claude-ai-incident-pypi-malware-supply-chain-riskshttps://runtimerebel.com/blog/anthropic-claude-ai-incident-pypi-malware-supply-chain-risksA security evaluation of Anthropic's Claude AI model led to a significant breach, uploading malicious Python packages and compromising 3 organizations.Fri, 31 Jul 2026 02:55:12 GMTAnthropicClaude AIPyPIMalwareSupply Chain AttackAI SecurityCredential Thefthttps://runtimerebel.com/blog/claude-mythos-securing-llms-in-enterprise-hype-vs-realityhttps://runtimerebel.com/blog/claude-mythos-securing-llms-in-enterprise-hype-vs-realityExamine the security implications of Anthropic's Claude Mythos and other LLMs in enterprise.Thu, 30 Jul 2026 17:32:21 GMTClaude MythosAnthropicLarge Language ModelsLLM SecurityPrompt InjectionAI GovernanceEnterprise AIhttps://runtimerebel.com/blog/anthropic-claude-global-outage-analyzing-529-overloaded-api-errorshttps://runtimerebel.com/blog/anthropic-claude-global-outage-analyzing-529-overloaded-api-errorsAnthropic confirms a global Claude AI outage, causing 529 Overloaded errors for web and API users. Analyze the impact on AI-dependent infrastructure.Thu, 30 Jul 2026 02:30:57 GMTAnthropicClaude AIApi OutageService Availabilityhttps://runtimerebel.com/blog/llms-achieve-novel-cryptanalysis-implications-for-digital-securityhttps://runtimerebel.com/blog/llms-achieve-novel-cryptanalysis-implications-for-digital-securityNew research reveals LLMs can perform advanced cryptanalysis, discovering novel attacks on cryptographic primitives like SpoC AEAD and KINDI, impacting future digital…Wed, 29 Jul 2026 02:47:03 GMTLLMCryptanalysisAICryptographyAnthropicSpoC AEADKINDINISThttps://runtimerebel.com/blog/claude-ai-hawk-256-post-quantum-crack-and-faster-7-round-aes-attackhttps://runtimerebel.com/blog/claude-ai-hawk-256-post-quantum-crack-and-faster-7-round-aes-attackAnthropic's Claude Mythos Preview facilitates a key-recovery attack on HAWK-256 and provides an 800-fold speedup for 7-round AES-128 cryptanalysis.Tue, 28 Jul 2026 21:09:42 GMTClaude AIHAWK 256AES 128Post Quantum CryptographyAnthropicCryptanalysishttps://runtimerebel.com/blog/claude-cowork-sandbox-escape-vm-to-macos-file-accesshttps://runtimerebel.com/blog/claude-cowork-sandbox-escape-vm-to-macos-file-accessA critical sandbox escape vulnerability in Anthropic's Claude Cowork allows AI agents to break out of their Linux VM, gaining full file access on macOS hosts, affecting…Thu, 23 Jul 2026 17:26:58 GMTClaude CoworkAnthropicmacOSSandbox EscapeVM EscapeAI SecurityData Privacyhttps://runtimerebel.com/blog/anthropic-claude-chrome-extension-malicious-ai-action-triggerhttps://runtimerebel.com/blog/anthropic-claude-chrome-extension-malicious-ai-action-triggerA flaw in Anthropic's Claude for Chrome extension enables malicious extensions to trigger AI actions, potentially abusing access to connected services like Gmail, Google…Thu, 16 Jul 2026 21:02:07 GMTAnthropicClaudeChrome ExtensionAIBrowser SecurityAPI Abusehttps://runtimerebel.com/blog/scans-target-model-context-protocol-servers-and-ai-credentialshttps://runtimerebel.com/blog/scans-target-model-context-protocol-servers-and-ai-credentialsSecurity researchers observe an increase in scans targeting Model Context Protocol (MCP) servers and AI credentials, potentially exposing sensitive data.Mon, 13 Jul 2026 06:54:49 GMTMCPAnthropicAI SecurityCredential TheftReconnaissancehttps://runtimerebel.com/blog/anthropic-extends-claude-fable-5-access-enterprise-migration-impactshttps://runtimerebel.com/blog/anthropic-extends-claude-fable-5-access-enterprise-migration-impactsAnthropic extends Claude Fable 5 access for paid users until July 19. Learn how this availability extension impacts enterprise AI security and infrastructure.Sun, 12 Jul 2026 20:51:40 GMTAnthropicClaude Fable 5AI SecurityCloud Availabilityhttps://runtimerebel.com/blog/claude-fable-relaunch-performance-degradation-ai-reliability-concernshttps://runtimerebel.com/blog/claude-fable-relaunch-performance-degradation-ai-reliability-concernsThe Claude Fable AI model's relaunch shows significant performance degradation, raising concerns for security professionals evaluating AI tool reliability.Fri, 03 Jul 2026 07:26:31 GMTAIClaude FableAnthropicModel PerformanceAI ReliabilityGenerative AIhttps://runtimerebel.com/blog/anthropic-clarifies-claude-fable-5-availability-post-july-7https://runtimerebel.com/blog/anthropic-clarifies-claude-fable-5-availability-post-july-7Anthropic clarifies Claude Fable 5 availability post-July 7 for subscribers, noting the AI model's temporary departure from usage-based plans.Fri, 03 Jul 2026 07:25:43 GMTAnthropicClaude Fable 5AI ModelSubscriptionService Availabilityhttps://runtimerebel.com/blog/anthropic-claude-fable-5-restored-after-u-s-export-control-lifthttps://runtimerebel.com/blog/anthropic-claude-fable-5-restored-after-u-s-export-control-liftAnthropic restores global access to Claude Fable 5 following the lifting of U.S. export controls linked to jailbreaking vulnerabilities and security concerns.Wed, 01 Jul 2026 09:16:25 GMTAnthropicClaude Fable 5Export ControlsAI SecurityJailbreakinghttps://runtimerebel.com/blog/anthropic-claude-5-sonnet-enterprise-performance-and-safety-analysishttps://runtimerebel.com/blog/anthropic-claude-5-sonnet-enterprise-performance-and-safety-analysisAnthropic releases Claude 5 Sonnet, achieving performance parity with Opus 4.8. Technical analysis of safety benchmarks and cybersecurity implications.Wed, 01 Jul 2026 05:40:28 GMTAnthropicClaude 5 SonnetAI SafetyLarge Language ModelsEnterprise Securityhttps://runtimerebel.com/blog/anthropic-restores-fable-5-and-mythos-5-access-after-export-lifthttps://runtimerebel.com/blog/anthropic-restores-fable-5-and-mythos-5-access-after-export-liftAnthropic is set to restore global access to its Fable 5 and Mythos 5 AI models following the lifting of Department of Commerce export controls this Wednesday.Wed, 01 Jul 2026 05:39:54 GMTAnthropicClaude FableExport ControlsAI SafetyDepartment of Commercehttps://runtimerebel.com/blog/anthropic-s-claude-cowork-mobile-enterprise-security-implicationshttps://runtimerebel.com/blog/anthropic-s-claude-cowork-mobile-enterprise-security-implicationsAnthropic tests Claude Cowork on mobile, enabling long-running AI tasks. This analysis covers potential data, access, and shadow IT risks for security teams.Fri, 26 Jun 2026 01:02:11 GMTAnthropicClaudeAIMobile SecurityEnterprise AIData Governancehttps://runtimerebel.com/blog/anthropic-fable-5-jailbroken-bypassing-ai-guardrails-for-malicious-usehttps://runtimerebel.com/blog/anthropic-fable-5-jailbroken-bypassing-ai-guardrails-for-malicious-useAnthropic's Fable 5, a version of Mythos Preview designed with cyberattack prevention guardrails, was jailbroken quickly. This exposes AI model security flaws.Tue, 23 Jun 2026 13:17:53 GMTAnthropicFable 5Mythos PreviewAI SecurityJailbreakLLM SecurityGuardrail Bypasshttps://runtimerebel.com/blog/us-export-controls-force-global-anthropic-fable-5-shutdownhttps://runtimerebel.com/blog/us-export-controls-force-global-anthropic-fable-5-shutdownUS government classifies Anthropic Fable 5 as a dangerous munition, leading to a total access shutdown and highlighting new risks in AI export controls.Sat, 20 Jun 2026 09:09:25 GMTAnthropicFable 5AI Export ControlsNational SecurityMythos 5https://runtimerebel.com/blog/us-government-orders-anthropic-to-restrict-foreign-access-to-ai-modelshttps://runtimerebel.com/blog/us-government-orders-anthropic-to-restrict-foreign-access-to-ai-modelsAnthropic suspends Fable 5 and Mythos 5 models worldwide following a US government order to block foreign national access due to jailbreak concerns.Sat, 13 Jun 2026 12:45:31 GMTAnthropicFable 5Mythos 5Export ControlsAi JailbreakingNational Securityhttps://runtimerebel.com/blog/anthropic-disables-fable-5-and-mythos-5-for-export-control-compliancehttps://runtimerebel.com/blog/anthropic-disables-fable-5-and-mythos-5-for-export-control-complianceAnthropic has taken its Fable 5 and Mythos 5 AI models offline following a Trump administration directive aimed at restricting foreign access to advanced AI.Sat, 13 Jun 2026 09:13:03 GMTAnthropicFable 5Mythos 5Export ControlsAI Securityhttps://runtimerebel.com/blog/us-bans-anthropic-fable-5-and-mythos-5-over-national-security-riskshttps://runtimerebel.com/blog/us-bans-anthropic-fable-5-and-mythos-5-over-national-security-risksAnthropic suspends Fable 5 and Mythos 5 AI models following a US government order citing national security risks regarding access by foreign nationals.Sat, 13 Jun 2026 09:12:06 GMTAnthropicFable 5Mythos 5National SecurityExport ControlsAI Securityhttps://runtimerebel.com/blog/claude-fable-5-no-major-security-shift-from-mythoshttps://runtimerebel.com/blog/claude-fable-5-no-major-security-shift-from-mythosAnthropic's Claude Fable 5 retains security posture of Mythos 5, improving over Mythos Preview. This analysis details its implications for secure AI integration.Fri, 12 Jun 2026 13:22:19 GMTAnthropicClaude Fable 5MythosAI SecurityLLM Securityhttps://runtimerebel.com/blog/anthropic-fable-5-ai-jailbreak-claim-analysis-mitigationshttps://runtimerebel.com/blog/anthropic-fable-5-ai-jailbreak-claim-analysis-mitigationsAn alleged prompt-based AI jailbreak of Anthropic's Fable 5 is disputed. This analysis covers the claim, Anthropic's response, and mitigation strategies for large…Fri, 12 Jun 2026 09:40:21 GMTAI SecurityAnthropicFable 5AI JailbreakPrompt EngineeringLLM Securityhttps://runtimerebel.com/blog/anthropic-claude-fable-5-release-evaluating-ai-cyber-safeguardshttps://runtimerebel.com/blog/anthropic-claude-fable-5-release-evaluating-ai-cyber-safeguardsAnthropic releases Claude Fable 5 with specialized safety classifiers to prevent cyber misuse while offering Claude Mythos 5 for vetted security researchers.Wed, 10 Jun 2026 09:30:26 GMTAnthropicClaude Fable 5Claude Mythos 5AI SafetyCyber SafeguardsThreat Modelinghttps://runtimerebel.com/blog/claude-fable-5-anthropic-unveils-new-high-performance-ai-modelhttps://runtimerebel.com/blog/claude-fable-5-anthropic-unveils-new-high-performance-ai-modelAnthropic releases Claude Fable 5, a limited-time high-performance AI model based on the Mythos architecture, targeting advanced reasoning and efficiency.Wed, 10 Jun 2026 05:38:24 GMTAnthropicClaude Fable 5Mythos ArchitectureAI SecurityThreat Detectionhttps://runtimerebel.com/blog/anthropic-mythos-preview-advancing-ai-offensive-security-performancehttps://runtimerebel.com/blog/anthropic-mythos-preview-advancing-ai-offensive-security-performanceXBOW evaluates Anthropic's Mythos Preview model, revealing high efficacy in automated vulnerability discovery, reverse engineering, and exploit development.Tue, 09 Jun 2026 17:00:25 GMTAnthropicMythos PreviewVulnerability ResearchAI SecurityXBOWhttps://runtimerebel.com/blog/anthropic-project-glasswing-ai-vulnerability-discovery-challengeshttps://runtimerebel.com/blog/anthropic-project-glasswing-ai-vulnerability-discovery-challengesAnthropic's Project Glasswing identifies 23,000 potential vulnerabilities via the Mythos AI model, highlighting the massive gap between discovery and patching.Mon, 08 Jun 2026 13:37:42 GMTAnthropicMythos AIProject GlasswingOSS SecurityAI Securityhttps://runtimerebel.com/blog/unpatched-comodo-antivirus-flaw-and-anthropic-ai-threat-mappinghttps://runtimerebel.com/blog/unpatched-comodo-antivirus-flaw-and-anthropic-ai-threat-mappingResearchers reveal an unpatched privilege escalation flaw in Comodo Antivirus and a new taxonomy for AI-driven cyber threats by Anthropic and the UK AISI.Fri, 05 Jun 2026 13:11:14 GMTComodo AntivirusAnthropicRansomwareAI Securityhttps://runtimerebel.com/blog/anthropic-claude-code-github-action-flaw-enables-repo-hijackinghttps://runtimerebel.com/blog/anthropic-claude-code-github-action-flaw-enables-repo-hijackingA critical flaw in Anthropic's Claude Code GitHub Action allowed attackers to hijack public repositories using malicious issues, posing supply chain risks.Thu, 04 Jun 2026 17:08:52 GMTAnthropicClaude CodeGitHub ActionsCI CD SecurityRyotaKhttps://runtimerebel.com/blog/anthropic-s-mythos-ai-collaboration-with-enisa-for-eu-ai-securityhttps://runtimerebel.com/blog/anthropic-s-mythos-ai-collaboration-with-enisa-for-eu-ai-securityAnthropic integrates its Mythos AI into ENISA's Project Glasswing, fostering EU-US collaboration on AI safety, security, and risk assessment for critical infrastructure.Tue, 02 Jun 2026 05:40:47 GMTAnthropicMythos AIENISAAI SafetyProject GlasswingEuropean CommissionAI Securityhttps://runtimerebel.com/blog/anthropic-claude-mythos-class-models-security-implications-of-public-rollouthttps://runtimerebel.com/blog/anthropic-claude-mythos-class-models-security-implications-of-public-rolloutAnthropic confirms public rollout plans for Claude Mythos-class models, addressing previous delays caused by software security risks and safety concerns.Fri, 29 May 2026 01:00:17 GMTAnthropicClaude MythosAI SecurityPrompt InjectionLarge Language Modelshttps://runtimerebel.com/blog/malicious-npm-package-targets-claude-ai-user-data-technical-analysishttps://runtimerebel.com/blog/malicious-npm-package-targets-claude-ai-user-data-technical-analysisResearchers discover mouse5212-super-formatter, a malicious npm package designed to exfiltrate sensitive files from Claude AI user directories.Wed, 27 May 2026 17:12:05 GMTNPMClaude AISupply Chain AttackData ExfiltrationAnthropichttps://runtimerebel.com/blog/anthropic-claude-enterprise-security-governance-via-28-integrationshttps://runtimerebel.com/blog/anthropic-claude-enterprise-security-governance-via-28-integrationsAnthropic expands Claude’s security posture with 28 integrations from CrowdStrike, Okta, and Microsoft to enhance enterprise AI visibility and governance.Tue, 26 May 2026 13:13:27 GMTAnthropicClaudeAI SecurityGovernanceEnterprise Securityhttps://runtimerebel.com/blog/anthropic-claude-code-integration-of-mythos-model-raises-security-riskshttps://runtimerebel.com/blog/anthropic-claude-code-integration-of-mythos-model-raises-security-risksAnthropic may be integrating its restricted Mythos model into Claude Code, raising concerns about autonomous agentic capabilities and AI safety levels.Mon, 25 May 2026 20:35:06 GMTAnthropicClaude CodeMythosAI SecurityAutonomous Agentshttps://runtimerebel.com/blog/anthropic-project-glasswing-uncovers-10000-high-severity-flawshttps://runtimerebel.com/blog/anthropic-project-glasswing-uncovers-10000-high-severity-flawsAnthropic's Claude Mythos AI identifies over 10,000 critical and high-severity vulnerabilities in systemically important software via Project Glasswing.Sat, 23 May 2026 16:25:32 GMTAnthropicProject GlasswingClaude MythosVulnerability ResearchAI Securityhttps://runtimerebel.com/blog/claude-code-sandbox-bypass-anthropic-patches-cli-vulnerabilityhttps://runtimerebel.com/blog/claude-code-sandbox-bypass-anthropic-patches-cli-vulnerabilityAnthropic recently addressed a sandbox bypass in Claude Code. This vulnerability could have allowed data exfiltration when combined with prompt injection.Wed, 20 May 2026 13:04:49 GMTAnthropicClaude CodeSandbox BypassAI SecurityPrompt Injectionhttps://runtimerebel.com/blog/ai-powered-exploit-surge-mitigating-automated-attack-developmenthttps://runtimerebel.com/blog/ai-powered-exploit-surge-mitigating-automated-attack-developmentAnthropic's Claude Security counters the emerging threat of AI-accelerated exploit generation, enhancing defense against novel vulnerabilities and attack vectors.Fri, 01 May 2026 00:54:17 GMTAI SecurityExploit DevelopmentAnthropicClaude SecurityAI ThreatsAutomated ExploitsVulnerability Researchhttps://runtimerebel.com/blog/claude-mythos-analyzing-ai-threat-rumors-in-japan-finance-sectorhttps://runtimerebel.com/blog/claude-mythos-analyzing-ai-threat-rumors-in-japan-finance-sectorAn investigation into the Claude Mythos panic in Japan's financial sector and how security experts distinguish between AI hype and actual cyber risks.Thu, 30 Apr 2026 05:12:59 GMTClaude MythosAnthropicJapanAdversarial AIFinancial Serviceshttps://runtimerebel.com/blog/firefox-150-patch-271-zero-days-found-via-claude-mythos-update-nowhttps://runtimerebel.com/blog/firefox-150-patch-271-zero-days-found-via-claude-mythos-update-nowFirefox 150 addresses 271 vulnerabilities discovered by Anthropic’s Claude Mythos AI model, highlighting a shift in automated vulnerability discovery.Wed, 29 Apr 2026 12:42:45 GMTFirefoxAnthropicClaude MythosMozillaAI SecurityBrowser Securityhttps://runtimerebel.com/blog/anthropic-ai-agent-memory-vulnerability-data-exposure-riskshttps://runtimerebel.com/blog/anthropic-ai-agent-memory-vulnerability-data-exposure-risksCisco discovered a significant memory handling vulnerability in Anthropic AI agents, risking data exposure. This highlights persistent security challenges in AI systems.Thu, 23 Apr 2026 16:43:20 GMTAnthropicAI SecurityMemory ManagementData ExposureCiscohttps://runtimerebel.com/blog/anthropic-project-glasswing-the-shift-to-ai-driven-zero-day-discoveryhttps://runtimerebel.com/blog/anthropic-project-glasswing-the-shift-to-ai-driven-zero-day-discoveryAnthropic delays Project Glasswing after its AI model identifies critical zero-day vulnerabilities across major tech stacks, sparking a massive patching effort.Thu, 23 Apr 2026 12:29:11 GMTAnthropicProject GlasswingZero-DayAI SecurityPatch Management