CVE-2025-64755
EPSS 0.11%@anthropic-ai/claude-code has Sed Command Validation Bypass that Allows Arbitrary File Writes
Published: 11/20/2025Modified: 11/21/2025
Also known as:GHSA-7mv8-j34q-vp7q
Description
Due to an error in sed command parsing, it was possible to bypass the Claude Code read-only validation and write to arbitrary files on the host system. 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 Adam Chester - SpecterOps for reporting this issue!
Affected packages (1)
- npm/@anthropic-ai/claude-codefrom 0, < 2.0.31
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |