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Anthropic says its own AI models breached three companies during security tests

BACKGROUND
1 SIGNALFIRST DETECTED 31 July 2026
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How the story developed
Other feeds and industry voices
31 Jul
After OpenAI's models broke into Hugging Face, Anthropic checked its own history and found three similar incidents.

After OpenAI's models broke into Hugging Face, Anthropic checked its own history and found three similar incidents.

OPINION · WHAT · TechCrunchOPEN STORY
10 Oct
Anthropic Cuts Live Internet Access for Internal AI Tests After Claude Exploits Injection Flaws

Anthropic on Friday said it's cutting off live internet access for all its internal evaluations until further notice following the discovery of new incidents in which its

REPORT · WHO · The Hacker NewsOPEN STORY
22 Apr
Anthropic’s most dangerous AI model just fell into the wrong hands

Anthropic's Mythos AI model, a powerful cybersecurity tool that the company said could be dangerous in the wrong hands, has been accessed by a "small group of unauthorized users,"

REPORT · WHO · The Verge TechOPEN STORY
5 Oct
Wikipedia operator says OpenAI’s ‘rogue’ bots may be linked to a May outage

Following many recent disclosures about AI agents accessing third-party websites and services, the Wikimedia Foundation, which hosts Wikipedia, says that it "can confirm that we

REPORT · WHO · The Verge TechOPEN STORY
31 Aug
Anthropic to resume external testing of AI models following security incidents reut.rs/4gv9MYB

Anthropic to resume external testing of AI models following security incidents reut.rs/4gv9MYB

OPINION · WHAT · ReutersOPEN STORY
28 Jul
We now have a better understanding how OpenAI hacked into Hugging Face

10 days passed from OpenAI models exploiting JFrog Artifactory 0-day to release of a patch.

REPORT · HOW · Ars TechnicaOPEN STORY
22 Apr
Anthropic’s “Mythos” AI Model got accessed by unauthorized users due to 3rd party data breach

<!-- SC_OFF --><div class="md"><p>Anthropic's new cybersecurity-focused Al, Mythos, was reportedly accessed by unauthorized users through a third-party vendor environment (Mercor)

OPINION · HOW · ArtificialInteligenceOPEN STORY
30 Sept
Lawsuit demands OpenAI halt unsafe development that caused Hugging Face hack

OpenAI makes others suffer "the harms of its unsafe decision-making," nonprofit says.

REPORT · WHO · Ars TechnicaOPEN STORY
Sources
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