GHSA-xq4m-mc3c-vvg3

Source

https://github.com/advisories/GHSA-xq4m-mc3c-vvg3

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/12/GHSA-xq4m-mc3c-vvg3/GHSA-xq4m-mc3c-vvg3.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-xq4m-mc3c-vvg3

Aliases

CVE-2025-66032

Published

2025-12-03T16:27:19Z

Modified

2025-12-05T12:27:53.035426Z

Severity

8.7 (High) CVSS_V4 - 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 CVSS Calculator

Summary

Claude Code Command Validation Bypass Allows Arbitrary Code Execution

Details

Due to errors in parsing shell commands related to $IFS and short CLI flags, it was possible to bypass the Claude Code read-only validation and trigger arbitrary code execution. Reliably exploiting this requires the ability to add untrusted content into a Claude Code context window.

Users on standard Claude Code auto-update have received this fix already. Users performing manual updates are advised to update to the latest version.

Thank you to RyotaK from GMO Flatt Security Inc. for reporting this issue!

Database specific

{
    "github_reviewed_at": "2025-12-03T16:27:19Z",
    "severity": "HIGH",
    "cwe_ids": [
        "CWE-20",
        "CWE-77"
    ],
    "github_reviewed": true,
    "nvd_published_at": "2025-12-03T19:15:57Z"
}

References

Affected packages

npm / @anthropic-ai/claude-code

Package

Name: @anthropic-ai/claude-code; View open source insights on deps.dev
Purl: pkg:npm/%40anthropic-ai/claude-code

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1.0.93

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/12/GHSA-xq4m-mc3c-vvg3/GHSA-xq4m-mc3c-vvg3.json"