CVE-2025-59828

CRITICAL

Claude Code < 1.0.39 - Missing Authorization via Yarn Plugin Auto-Execution

Title source: llm
STIX 2.1

Description

Claude Code is an agentic coding tool. Prior to Claude Code version 1.0.39, when using Claude Code with Yarn versions 2.0+, Yarn plugins are auto-executed when running yarn --version. This could lead to a bypass of the directory trust dialog in Claude Code, as plugins would be executed prior to the user accepting the risks of working in an untrusted directory. Users running Yarn Classic were unaffected by this issue. This issue has been fixed in version 1.0.39. Users on standard Claude Code auto-update will have received this fix automatically. Users performing manual updates are advised to update to the latest version.

References (1)

Core 1
Core References

Scores

CVSS v3 9.8
EPSS 0.0033
EPSS Percentile 24.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-862 CWE-829
Status published
Products (2)
anthropic/claude_code < 1.0.39
anthropic-ai/claude-code 0 - 1.0.39npm
Published Sep 24, 2025
Tracked Since Feb 18, 2026