Vulnerability · Published May 27, 2026 · Assigned by GitHub_M
CVE-2026-44590Sherlock: Command Injection via pull_request_target in validate_modified_targets.yml
Critical 9.3
In plain English
A critical-severity OS command injection in sherlock from sherlock-project. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 67% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official description
Sherlock hunts down social media accounts by username across social networks. Prior to 0.16.1, the GitHub Actions workflow validate_modified_targets.yml is vulnerable to command injection via the pull_request_target trigger. Any GitHub user can execute arbitrary commands on the CI runner and exfiltrate the GITHUB_TOKEN by opening a pull request. No approval, review, or merge is required. This vulnerability is fixed in 0.16.1.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:24.04:LTS | sherlock | no fix listed | UBUNTU-CVE-2026-44590 |
| Ubuntu:25.10 | sherlock | no fix listed | UBUNTU-CVE-2026-44590 |
| Ubuntu:26.04:LTS | sherlock | no fix listed | UBUNTU-CVE-2026-44590 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| sherlock-project | sherlock | < 0.16.1 |
Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N