Critical severity · published Sep 24, 2025
CVE-2025-59828
Claude Code Vulnerable to Arbitrary Code Execution via Plugin Autoloading with Specific Yarn Versions
9.8
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CL
claude-code · anthropics
< 1.0.39 · source: vendor
CC
Claude Code · Anthropic
before 1.0.39 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-59828
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-59828
Third Party Advisory
https://github.com/anthropics/claude-code/security/advisories/GHSA-2jjv-qf24-vfm4
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