VNX-GH-002: Untrusted input written to GITHUB_ENV or GITHUB_PATH
Attacker-controlled text is appended to the job's environment or PATH file.
Lines appended to $GITHUB_ENV become environment variables for every later step, and lines appended to $GITHUB_PATH prepend directories to PATH. A value containing a newline can define LD_PRELOAD, NODE_OPTIONS, BASH_ENV or a new PATH entry, giving code execution in later steps even when those steps are written safely.
| Severity | High |
| Confidence | high |
| CWE | CWE-77, CWE-427 |
| Command | vulnetix gha workflows, vulnetix gha audit |
| Mappings | T1574 |
Remediation
Do not write untrusted values to GITHUB_ENV/GITHUB_PATH. If a later step needs the value, pass it through a step output and env:, or use a random heredoc delimiter and validate the value first.
Run only this rule
vulnetix gha workflows --rule VNX-GH-002Scoring
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:H/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.