RCE in Sherlock-Project Sherlock

CVE-2026-44590

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.

Vulnerability class: Command Injection (OS Command Injection)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N.

EPSS exploit prediction

EPSS: 0.013 (69.3th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-44590: held from 0.011 to 0.013.

EPSS over last 30 days · oldest: 0.011 · newest: 0.013 · change: +0.002

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2026-44590?
CVE-2026-44590 is a critical-severity vulnerability in Sherlock-Project Sherlock, classified under OS Command Injection. CVSS score: 9.3/10. Published 2026-05-27.
How severe is CVE-2026-44590?
Critical severity. CVSS v3 base score is 9.3 out of 10.
Is CVE-2026-44590 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.