PT-2025-47513 · Yarn+1 · Yarn+1

Published 2025-11-19 · Updated 2025-11-21 · CVE-2025-65099

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Claude Code versions prior to 1.0.39

Description Prior to version 1.0.39, Claude Code could be tricked into executing code contained in a project through Yarn plugins before the user accepted the startup trust dialog, when running on a machine with Yarn 3.0 or above. Exploitation required a user to start Claude Code in an untrusted directory while using Yarn 3.0 or higher.

Recommendations Update to version 1.0.39 or later.

Exploit

Fix

Code Injection

Weakness Enumeration

CWE-94

Related Identifiers

CVE-2025-65099

GHSA-5HHX-V7F6-X7GV

Affected Products

Claude-Code

Yarn

References · 10

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/65xxx/CVE-2025-65099.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-65099 · Security Note
• https://osv.dev/vulnerability/GHSA-5hhx-v7f6-x7gv · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-65099 · Vendor Advisory
• https://github.com/anthropics/claude-code · Note
• https://github.com/anthropics/claude-code/security/advisories/GHSA-5hhx-v7f6-x7gv · Note
• https://twitter.com/CVEnew/status/1991409475014516866 · Twitter Post
• https://twitter.com/VulmonFeeds/status/1991248241371840925 · Twitter Post
• https://twitter.com/pHo9UBenaA/status/1991860964392866223 · Twitter Post
• https://t.me/CVEtracker/37765 · Telegram Post