PT-2026-83240 · Js Recon · Js-Recon

CVE-2026-55378

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Published

2026-08-28

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Updated

2026-09-01

CVSS v4.0

9.3

Critical

VectorAV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Name of the Vulnerable Software and Affected Versions JS Recon versions 1.2.1-beta.1 through 1.3.1-beta.1
Description The PR Branch Checker workflow in .github/workflows/pr checker.yml improperly handles untrusted values. Specifically, the github.head ref and github.event.pull request.head.repo.full name values are assigned to the BRANCH NAME and SOURCE REPO variables and then interpolated into a shell gh pr comment command. A remote attacker can use shell metacharacters within a branch or fork name to execute arbitrary commands on the GitHub Actions runner using the GITHUB TOKEN, which possesses write permissions for pull requests.
Recommendations Update to version 1.3.1-beta.2.

Exploit

Fix

OS Command Injection

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Weakness Enumeration

Related Identifiers

CVE-2026-55378
GHSA-W9CJ-MG3X-QJM4

Affected Products

Js-Recon