CVE-2025-59829
mediumpriority · track · 26EPSS 0.004 · 39 %ileEUUSEPSS · scored 2026-10-27
Claude Code is an agentic coding tool. Versions below 1.0.120 failed to account for symlinks when checking permission deny rules. If a user explicitly denied Claude Code access to a file and Claude Code had access to a symlink pointing to that file, it was possible for Claude Code to access the file. 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. This issue is fixed in version 1.0.120.
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–medium · 0.6–6.5
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-66m2-gx93-v996Claude Code permission deny bypass through symlink2025-10-03ghsa · osvUS
Claude Code failed to account for symlinks when checking permission deny rules. If a user explicitly denied Claude Code access to a file and Claude Code had access to a symlink pointing to that file, it was possible for Claude Code to access the file. 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. Thank you to https://hackerone.com/vinai for reporting this issue!
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (4)
External citations — patches, advisories, analysis.
- https://docs.claude.com/en/docs/claude-code/overviewPatchcnnvd
- https://github.com/anthropics/claude-code/security/advisories/GHSA-66m2-gx93-v996cnnvd
- https://github.com/anthropics/claude-code/security/advisories/GHSA-66m2-gx93-v996enisa_euvd
- https://github.com/anthropics/claude-code/security/advisories/GHSA-66m2-gx93-v996Vendor Advisorynvd
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