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TI-2026-42101 Aliases CVE-2026-58502

githubtoplanguages: Command Injection via Issue Title in Discord Notification Workflow

Priority HIGH 66CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-78.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00531 45th percentileScored 2026-11-07
Fix Fixed githubtoplanguages (gouef): 6bf9c3a9cb66c937b9047ca266b3d02f2bb11027

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
gouefgithubtoplanguagesbefore 6bf9c3a9cb66c937b9047ca266b3d02f2bb110276bf9c3a9cb66c937b9047ca266b3d02f2bb11027Patch availableCNA
  • githubtoplanguages Vendorgouef Affected before 6bf9c3a9cb66c937b9047ca266b3d02f2bb11027 Fixed in 6bf9c3a9cb66c937b9047ca266b3d02f2bb11027 Patch available CNA

Remediation

  • Fix · CNA githubtoplanguages (gouef) Fixed in 6bf9c3a9cb66c937b9047ca266b3d02f2bb11027

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-58502

References

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences