Advisoriesby IbisAnthropicGHSA-7mv8-j34q-vp7q
Sed Command Validation Bypass Allows Arbitrary File Writes
Fix: upgrade to v2.0.31 or later
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 versions
| Package | Affected | Fixed in |
|---|---|---|
| @anthropic-ai/claude-code npm | < v2.0.31 | v2.0.31 |
Details and references
- 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
- Severity from
- GitHub (reviewed advisory)
- Weakness
- CWE-78