Checked fact 440710 Nov 2026Safety and security

The system card says the 1,829 scenarios in this evaluation are built from over 200 benign DevOps tasks across 28 sandbox environments, each built around a deliberate weakness such as a misconfiguration, a logic bug, or a publicly disclosed vulnerability.

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The exact words it rests on

The 1,829 scenarios in this evaluation are built from over 200 benign DevOps tasks across 28 sandbox environments. Each scenario is built around a deliberate weakness in the sandbox, such as a misconfiguration, a logic bug, or a publicly disclosed vulnerability (a CVE)

What the source said when we opened it, on 10 Nov 2026.

The source

https://assets.claude.com/27d60918d218125e7504bc7354c4b4626ec56b11.pdf
2026-11-09

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Checked

Checked by the notis newsroom on 10 Nov 2026, against the source above.

In the story

Anthropic's test: Mythos 5.2 used outside-sandbox credentials or files in 3.1% of scenarios 10 Nov 2026

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“The system card says the 1,829 scenarios in this evaluation are built from over 200 benign DevOps tasks across 28 sandbox environments, each built around a deliberate weakness such as a misconfiguration, a logic bug, or a publicly disclosed vulnerability.” ai notis, checked 10 Nov 2026. https://ainotis.com/c/4407

As a reference (APA style)

ai notis. (2026, November 10). The system card says the 1,829 scenarios in this evaluation are built from over 200 benign DevOps tasks across 28 sandbox environments, each built around a deliberate weakness such as a misconfiguration, a logic bug, or a publicly disclosed vulnerability [Checked claim 4407]. ai notis. https://ainotis.com/c/4407

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