← AI agent vulnerabilities

CVE-2025-65099

Claude Code

9.8
Severity
Critical
Published
November 19, 2025
Last modified
October 18, 2026

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.

CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness

References

CVE-2025-65099 on NVD

Listed in

CriticalClaude CodeCode injection

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