Critical 9.3Published Aug 28, 2026

CVE-2026-55378JS Recon: Command injection in PR Branch Checker workflow via untrusted pull request context values

Updated under an hour ago (2026-10-19 08:00 UTC)

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Every CVE for shriyanss js-recon

Exploited in the last 30 days

JS Recon is a JavaScript enumeration and SAST tool. From 1.2.1-beta.1 until 1.3.1-beta.2, the PR Branch Checker workflow in .github/workflows/pr_checker.yml places github.head_ref and github.event.pull_request.head.repo.full_name into BRANCH_NAME and SOURCE_REPO and interpolates those untrusted values into a shell gh pr comment command. A remote user who opens a pull request can use shell metacharacters in a branch or fork name to execute commands in the GitHub Actions runner with the workflow's GITHUB_TOKEN, which has pull-requests write permission. This issue is fixed in version 1.3.1-beta.2.

CVSS: 9.3 CRITICAL (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Weakness (CWE): CWE-78
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Sep 1, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

shriyanss js-recon shriyanss:js_recon (from the name)	from 1.2.1-beta.1, < 1.3.1-beta.2	CNA record

References

https://github.com/js-recon/js-recon/security/advisories/GHSA-w9cj-mg3x-qjm4x-refsource-confirm
https://github.com/js-recon/js-recon/pull/121x-refsource-misc
https://github.com/js-recon/js-recon/commit/447876c4bfa9ec5bc98cbc65d7a3e5f889412491x-refsource-misc
https://github.com/js-recon/js-recon/releases/tag/v1.3.1-beta.2x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.