Vulnerability Description
githubtoplanguages generates a user's top GitHub languages as an SVG. The .github/workflows/discord-issue.yml workflow runs when an issue is opened or closed and interpolates github.event.issue.title directly into the Bash assignment for ISSUE_TITLE before shell parsing. An issue title containing shell command-substitution syntax can therefore execute commands on the GitHub Actions runner before the title is included in the Discord notification sent through DISCORD_WEBHOOK. Successful exploitation can manipulate or spoof trusted bot notifications and may expose the Discord webhook secret or other workflow environment data, depending on repository permissions. This issue is fixed by commit 6bf9c3a9cb66c937b9047ca266b3d02f2bb11027.
Related Weaknesses (CWE)
References
- https://github.com/gouef/githubtoplanguages/commit/6bf9c3a9cb66c937b9047ca266b3d
- https://github.com/gouef/githubtoplanguages/security/advisories/GHSA-c3xh-98xp-6
- https://github.com/gouef/githubtoplanguages/security/advisories/GHSA-c3xh-98xp-6
FAQ
What is CVE-2026-58502?
CVE-2026-58502 is a documented vulnerability. githubtoplanguages generates a user's top GitHub languages as an SVG. The .github/workflows/discord-issue.yml workflow runs when an issue is opened or closed and interpolates github.event.issue.title ...
How severe is CVE-2026-58502?
CVSS scoring is not yet available for CVE-2026-58502. Check NVD for updates.
Is there a patch for CVE-2026-58502?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.