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Anthropic's Mythos model accessed by unauthorized users, Bloomberg News reports

BACKGROUND
1 SIGNALFIRST DETECTED 22 April 2026
Narrative synthesis pending — 1 signal collected.
How the story developed
Other feeds and industry voices
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
21 Apr
Unauthorized group has gained access to Anthropic’s exclusive cyber tool Mythos, report claims

Anthropic told TechCrunch it is investigating the claims, but maintains that there is no evidence that its systems have been impacted.

REPORT · WHAT · TechCrunch AIOPEN 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
20 Apr
NSA is said to be using Anthropic's restricted Mythos AI model.

NSA is said to be using Anthropic's restricted Mythos AI model.

OPINION · WHO · TechCrunchOPEN STORY
12 May
Anthropic's Mythos sends US banks rushing to plug cyber holes reut.rs/4u9sNUM

Anthropic's Mythos sends US banks rushing to plug cyber holes reut.rs/4u9sNUM

OPINION · WHAT · ReutersOPEN STORY
18 May
Anthropic to brief global financial watchdog on cyber flaws exposed by Mythos, FT reports reut.rs/4uUr7hY

Anthropic to brief global financial watchdog on cyber flaws exposed by Mythos, FT reports reut.rs/4uUr7hY

OPINION · WHAT · ReutersOPEN STORY
26 Jun
US allows Anthropic to release Mythos to 'trusted partners'

<a href="https://news.ycombinator.com/item?id=48692995">Comments</a>

REPORT · WHAT · Hacker News Best (RSS)OPEN STORY
20 Apr
What do we know about Anthropic's Mythos amid rising concerns? reut.rs/4cEOyUY

What do we know about Anthropic's Mythos amid rising concerns? reut.rs/4cEOyUY

OPINION · WHAT · ReutersOPEN STORY
Sources
Reuters

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