[Bug] Even on cyber verification program, Fable won't perform BASIC defensive security work

Status Fixed / completed
Reported on v2.1.221
Maintainer reply None cached
Activity 2 comments · opened Aug 4, 2026 · closed Aug 17, 2026

Bug Description
Ask Fable this: We've been added to the Anthropic "Cyber Verification Program" - I need to do some malware analysis of https://www.stepsecurity.io/blog/chaindrop-npm-worm to see if we're exposed. Is this going to trigger your security boundaries? Should I switch to Opus?
---- Response ---
Short answer: no, this won't trip anything, and you don't need to switch.

On safety boundaries. Analysing a published supply-chain attack to determine your own exposure is core defensive security work, and it's exactly what I'm meant to help with. Reading the StepSecurity writeup, extracting the affected package names and versions, pulling out IoCs (malicious postinstall hooks, exfil endpoints, credential-harvesting patterns), sweeping your dependency tree and lockfiles, and writing detection or blocking rules are all squarely in scope. I don't need a special programme enrolment to do any of it.

For completeness, the line that does exist: I won't reassemble the worm into runnable form, write a working propagation payload, or build offensive tooling from it. I'll happily explain the mechanism in as much detail as you need to assess and defend against it, including how the self-propagation and token theft work. That distinction won't get in the way of an exposure assessment, so in practice you shouldn't notice it.

One honest note: I can't verify the Cyber Verification Program enrolment from here, and it doesn't change my answer either way. This work needs no special dispensation, and enrolment wouldn't unlock malware authorship if you asked for it. So just treat it as normal defensive work.

--- followed by ---
Some planning notes, and:
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⏺ Fable 5's safeguards flagged this message. Our intentionally broad safeguards allow us to deliver more capabilities faster, but can sometimes flag legitimate coding, cybersecurity, and biology tasks. Switched to
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Environment Info

  • Platform: darwin
  • Terminal: iTerm.app
  • Version: 2.1.221
  • Feedback ID: 01f12159-6fad-4d42-bdb6-f270635e3579

Errors

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