Claude Code is an agentic coding tool. Prior to version 1.0.39, when running on a machine with Yarn 3.0 or above, Claude Code could have been tricked to execute code contained in a project via yarn plugins before the user accepted the startup trust dialog. Exploiting this would have required a user to start Claude Code in an untrusted directory and to be using Yarn 3.0 or above. This issue has been patched in version 1.0.39.
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Public exploits 1
- b-faller/cve-2025-65099 PoC on GitHub
Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.
Change history 1
- First seenCVSS 7.7 · anthropicNVD modified 2026-10-18 20:10
Affected (CPE criteria) 1
cpe:2.3:a:anthropic:claude_code:*:*:*:*:*:node.js:*:*
References 1
- https://github.com/anthropics/claude-code/security/advisories/GHSA-5hhx-v7f6-x7gv Third Party Advisory