SB2026043034 - UNIX symbolic link following in Claude Code
Published: April 30, 2026
Security Bulletin ID
SB2026043034
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) UNIX symbolic link following (CVE-ID: CVE-2026-25724)
CWE-ID: CWE-61 - UNIX Symbolic Link (Symlink) Following
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to unix symbolic link following in deny rule enforcement for file access when accessing files through symbolic links. A remote attacker can cause Claude Code to read a denied file via a symbolic link to disclose sensitive information.
User interaction is required.
Remediation
Install update from vendor's website.