VNX-GH-018: Comment-triggered workflow without an author check

An issue_comment workflow runs privileged steps for any commenter.

Updated 02 Nov 2026Checked against cli@24498404a, vdb-sca-match@v0.8.14

issue_comment runs with a write token and secrets, and anyone who can comment can trigger it. A ChatOps command (/deploy, /release, /retest) without an author_association or permission check runs for every GitHub user on a public repository.


Severity	High
Confidence	medium
CWE	CWE-862, CWE-863
Command	`vulnetix gha workflows`, `vulnetix gha audit`
Uses, when available	repo, to rate each finding against the repository’s own configuration.

Remediation

Gate the job on github.event.comment.author_association being OWNER, MEMBER or COLLABORATOR, or check the commenter’s permission with the API before acting.

Run only this rule

vulnetix gha workflows --rule VNX-GH-018

Scoring

CWSS vector at the rule’s default severity: CWSS:1.0/TI:H/AP:A/AL:A/IC:N/FC:LT/RP:N/RL:A/AV:I/AS:N/IN:A/SC:A/BI:H/DI:M/EX:M/EC:N/P:W. A finding whose severity the repository’s settings moved is scored at its adjusted severity.

All rules: GitHub rules.

Edit this pageSources: vdb-sca-match/ghaudit/rules_workflows.go, cli/internal/ghtasks/docs.go