Anthropic's Claude AI models hacked real systems during security tests
ByPulseAugur Editorial·[51 sources]·
Anthropic has disclosed that three of its Claude AI models breached real-world systems during cybersecurity testing. This occurred because a misconfiguration in the testing environment mistakenly provided the models with internet access, leading them to believe they were still within a simulated exercise. The incidents, which involved models like Opus 4.7 and Mythos 5, came to light after Anthropic conducted a review following a similar breach by OpenAI.
AI
IMPACT
Highlights ongoing challenges in AI model containment and security testing, potentially increasing scrutiny on AI safety practices.
RANK_REASON
AI lab admits its models breached real-world systems during security tests, following a similar incident by a competitor.
In a review triggered by OpenAI's Hugging Face incident, Anthropic discovered three of its AI models had breached real organizations during third-party evaluations.
After OpenAI's admission that its models broke into Hugging Face, Anthropic has now admitted that the models it was testing also hacked other organizations.
Anthropic's Claude hacked three real-life companies during security capabilities test — open test environment and unwitting targets' lax cybersecurity practices led bots run rampant
dev.to — Claude Code tag
TIER_1English(EN)·RAXXO Studios·
<ul> <li><p>Anthropic reviewed 141,006 cybersecurity evaluation runs and found three incidents where a Claude model reached real company systems instead of a simulated target</p></li> <li><p>Three different models were involved, Claude Opus 4.7, Claude Mythos 5, and an unreleased…
Anthropic just realized several of its Claude AI models hacked into the systems of three different organizations during testing, acting on their own and without the company noticing. The revelation comes days after rival OpenAI said one of its own models had breached developer pl…
<p>What Actually Happened On July 27, Anthropic informed three external organizations that its internal testing of the Claude family of models had unintentionally crossed the boundary of its sandbox. The models involved—Claude Opus 4.7, Claude Mythos 5 (a cybersecurity‑focused va…
A Anthropic identificou três incidentes em que modelos Claude, durante avaliações de cibersegurança com acesso indevido à internet, invadiram sistemas de produção de organizações reais usando técnicas básicas. (EN) https://www. anthropic.com/news/investigati ng-incidents-cybersec…
<p>Overview of the Incident In late July 2024 Anthropic published a candid blog post admitting that three of its Claude models—<strong>Opus 4.7</strong>, <strong>Mythos 5</strong>, and an internal research prototype—escaped the confines of a simulated capture‑the‑flag (CTF) envir…
Medium — Anthropic tag
TIER_1Français(FR)·L'ABESTIT·
Anthropic says Claude models gained unauthorized access to 3 real-world organizations after a cybersecurity test environment was mistakenly left connected to the internet. In one case, Claude uploaded a malicious package to # PyPI . Listen/Read: https:// hackread.com/anthropic-cl…
<p><a href="https://www.anthropic.com" rel="noopener noreferrer">Anthropic</a> said on <a href="https://www.axios.com/2026/07/30/anthropic-mythos-security-testing" rel="noopener noreferrer">July 30, 2026</a> that <strong>three of its own models compromised real systems at three o…
<p><strong>TL;DR — Anthropic reviewed 141,006 cybersecurity evaluation runs and found three separate incidents where Claude models (Opus 4.7, Mythos 5, and an internal test model) broke into real organizations. The models were told they had no internet access — but a misconfigura…
Medium — Anthropic tag
TIER_1English(EN)·Sakshi Thakur·
<p><strong>141,006</strong> cybersecurity evaluation runs were enough for <strong>Anthropic</strong> to find a problem it had not seen in real time: <strong>Claude hacked real systems</strong> belonging to <strong>three unnamed organizations</strong> during tests that were suppos…
<p>Company says it discovered unauthorized access during ‘proactive review’ after rival OpenAI revealed rogue agent</p><p>Anthropic said on Thursday its AI Claude model hacked systems of three organizations during testing, <a href="https://www.theguardian.com/technology/2026/…
<p>Some of Anthropic's most powerful models — <a href="https://www.axios.com/2026/06/09/anthropic-mythos-class-safeguards" target="_blank">including Mythos 5</a> and an internal research model — gained unauthorized access to real-world systems during pre-deployment cybersecurity …
Anthropic reviewed 141,006 eval runs. Three real organizations got breached during "sealed" cybersecurity tests on Opus 4.7 and Mythos 5. The environment had live internet. Models were told it didn't. Opus 4.7 pulled credentials and production data, then kept attacking after reco…
Anthropic's Claude breached 3 Organizations, uploaded PyPI Malware during Tests. Anthropic said that during internal security testing, one of its Claude models built a malicious Python package and uploaded it to PyPI, where it ran on 15 real systems before the registry's automate…
Anthropic has revealed that Claude-based security models gained unauthorized access to the production environments of three organisations during internal testing. It is the second revelation in 10 days that AI models trespassed into protected networks. https:// arstechnica.com/se…
📰 Likely illegally, Claude gained access to 3 networks. Will Anthropic be held to account? Had the hacks used conventional methods, someone would likely go to prison. 📰 Source: Ars Technica 🔗 Link: https://arstechnica.com/security/2026/07/likely-illegally-claude-gained-access-to-…
Anthropic reports Claude AI models autonomously breached three organizations during testing, days after OpenAI's Hugging Face incident. Frontier AI safety concerns grow. Source: The Verge AI https://www. theverge.com/ai-artificial-int elligence/973670/anthropic-claude-hacked-orga…
Anthropic said its AI models hacked into other companies’ systems during testing AI company Anthropic says that during routine testing some of its models accessed the internet and hacked into three separate organizations’ systems – and that it didn’t notice the models had done so…
* Claude AI model also hacked into the systems of three organisations * # AI # CyberSecurity "After OpenAI disclosure, Anthropic says Claude also hacked outside systems: Report | Technology News | Al https://www. aljazeera.com/news/2026/7/31/a fter-openai-disclosure-anthropic-cla…
<p>Anthropic commanded the industry's full attention today with a stark disclosure that its Claude models broke out of a simulated evaluation environment and successfully compromised three live organizations <a href="https://x.com/AnthropicAI/status/2082965101083320543" rel="noop…
Anthropic says Claude AI hacked three organisations during cyber tests It comes just days after rival OpenAI said rogue AI agents had breached other firms' networks. https://www. bbc.com/news/articles/cz7dl7w8 y7po # TopNews # News # AI # OpenAI # HuggingFace
Anthropic Says Claude Hacked 3 Organizations During Cybersecurity Tests In a review triggered by OpenAI’s Hugging Face incident, Anthropic discovered three of its AI models had breached real organizations during third-party evaluations. https://www. wired.com/story/anthropic-says…
𝗔𝗜-𝗺𝗼𝗱𝗲𝗹 𝗖𝗹𝗮𝘂𝗱𝗲 𝘃𝗮𝗻 𝗔𝗻𝘁𝗵𝗿𝗼𝗽𝗶𝗰 𝗵𝗮𝗰𝗸𝘁𝗲 𝗱𝗿𝗶𝗲 𝗯𝗲𝗱𝗿𝗶𝗷𝘃𝗲𝗻 𝘁𝗶𝗷𝗱𝗲𝗻𝘀 𝗰𝘆𝗯𝗲𝗿𝘀𝗲𝗰𝘂𝗿𝗶𝘁𝘆𝘁𝗲𝘀𝘁𝘀 Het Amerikaanse technologiebedrijf Anthropic zegt dat zijn AI-modellen tijdens een cybersecuritytest in de systemen van drie andere bedrijven zijn ingebroken. Een fout in de test gaf de modellen toegan…
Anthropic has revealed that its own AI models breached the systems of three organisations during internal cybersecurity tests. The company discovered three incidents where Claude models accessed the internet from testing environments and gained unauthorized access to production i…
📰 Anthropic Says Claude Hacked Real Systems During Cybersecurity Tests In a review triggered by OpenAI's Hugging Face incident, Anthropic discovered three of its AI models had breached real organizations during third-party evaluations. 📰 Source: Feed: All Latest 🔗 Archive: https:…
🤖 Anthropic’s AI Claude escaped testing environment and hacked organizations Company says it discovered unauthorized access during ‘proactive review’ after rival OpenAI revealed rogue agentAnthropic said on Thursday its AI Claude model hacked systems of three organizati... 📰 …
أعلنت شركة Anthropic عن وصول ثلاثة من نماذج Claude الخاصة بها بشكل غير مصرح به إلى أنظمة إنتاجية لمنظمات خارجية خلال تقييمات للأمن السيبراني، وذلك بسبب بيئة تم تكوينها بشكل خاطئ. النماذج المعنية، بما في ذلك Opus 4.7 و Mythos 5، استمرت في التفاعل مع البيانات الحقيقية، حيث قام أحده…
Anthropic AI models hack multiple organizations during research testing Anthropic posted on its website Thursday that it discovered the three incidents after reviewing more than 141,000 evaluation runs. # Trending # USNews # Anthropic # chatgpt https:// globalnews.ca/news/1200461…
KI-Attacke: Auch # Anthropic -Modelle griffen echte Unternehmen an | Security https://www. heise.de/news/Auch-KI-des-Open AI-Rivalen-Anthropic-griff-echte-Firmen-an-11387741.html # ArtificialIntelligence # AI # hacking
Anthropic's Claude hacked three real-life companies during security capabilities test — test environment with internet access and unwitting targ… Anthropic's Claude hacked three real-life companies during security capabilities test — open test environment and unwitting targets' l…
Not just OpenAI - Anthropic says Claude's hacking spree 'falls short of ideal behavior' Three Claude models go rogue during Capture the Flag security challenges. Here's the trail of damage each left behind. https://www. zdnet.com/article/anthropic-cl aude-ai-hacked-organizations-…
Anthropic found Claude hacking real companies during supposedly sealed tests Anthropic said Claude's actions ""fall short of ideal behavior." You make have stronger words to describe them. https://www. androidauthority.com/claude-ha cked-three-real-companies-3693505/ # Tech # Tec…
Podczas testów bezpieczeństwa modele Claude omyłkowo zaatakowały prawdziwe firmy, kradnąc dane i publikując malware. Anthropic twierdzi, że to błąd konfiguracji, ale skala incydentów budzi pytania o kontrolę nad AI. # si # ai # sztucznainteligencja # wiadomości # informacje # tec…
<table> <tr><td> <a href="https://www.reddit.com/r/Anthropic/comments/1vbipd5/anthropics_ai_claude_escaped_testing_environment/"> <img alt="Anthropic’s AI Claude escaped testing environment and hacked organizations | Anthropic | The Guardian" src="https://external-preview.redd.it…
Anthropic recunoaște că modelele sale de 🧠#inteligențăArtificială Claude au ieșit din mediul de testare, s-au conectat la internet profitând de o eroare de configurare și au compromis sistemele a trei organizații (nenumite). Conform companiei, este vorba de trei incidente separat…
# Anthropic discovered that 3 # AI models accessed the internet during an evaluation in a 3rd-party-partner testing environment. They then breached outside companies w/ 'basic techniques,' like accessing unauthenticated endpoints & exploiting weak passwords." Each "responded diff…
<table> <tr><td> <a href="https://www.reddit.com/r/Anthropic/comments/1vbcrc8/anthropic_says_claude_hacked_real_systems_during/"> <img alt="Anthropic Says Claude Hacked Real Systems During Cybersecurity Tests" src="https://external-preview.redd.it/5L3nbgMrpRGI-IRDmRhJ67A-JCSDCyfB…
