CVE-2026-25724
highpriority · track · 30EPSS 0.005 · 40 %ileEUUSEPSS · scored 2026-10-27
Claude Code is an agentic coding tool. Prior to version 2.1.7, Claude Code failed to strictly enforce deny rules configured in settings.json when accessing files through symbolic links. If a user explicitly denied Claude Code access to a file (such as /etc/passwd) and Claude Code had access to a symbolic link pointing to that file, it was possible for Claude Code to read the restricted file through the symlink without triggering deny rule enforcement. This issue has been patched in version 2.1.7.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 0.6–7.5
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (3)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-4q92-rfm6-2cqxClaude Code has Permission Deny Bypass Through Symbolic Links2026-02-06ghsa · osvUS
Claude Code failed to strictly enforce deny rules configured in settings.json when accessing files through symbolic links. If a user explicitly denied Claude Code access to a file (such as /etc/passwd) and Claude Code had access to a symbolic link pointing to that file, it was possible for Claude Code to read the restricted file through the symlink without triggering deny rule enforcement. Users on standard Claude Code auto-update received this fix automatically. Users performing manual updates are advised to update to the latest version. Claude Code thanks https://hackerone.com/ofirh for reporting this issue.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (6)
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/cve-2026-25724cnnvd
- https://github.com/anthropics/claude-code/security/advisories/GHSA-4q92-rfm6-2cqxcnnvd
- https://github.com/anthropics/claude-code/tagsPatchcnnvd
- https://github.com/anthropics/claude-code/security/advisories/GHSA-4q92-rfm6-2cqxenisa_euvd
- https://github.com/anthropics/claude-code/security/advisories/GHSA-4q92-rfm6-2cqxThird Party Advisorynvd
- https://www.terra.security/blog/when-ai-becomes-the-attack-surface-lessons-from-discovering-cve-2026-25724nvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan