CVE-2026-20736

Summary

Gitea does not properly verify repository context when deleting attachments. A user who previously uploaded an attachment to a repository may be able to delete it after losing access to that repository by making the request through a different repository they can access.

Affected Software

Weaknesses

• CWE-284: CWE-284: Improper Access Control

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: partial

gitea: Gitea Web Attachment Deletion: Cross-Repository Unauthorized Deletion via Missing Repo Ownership Check

Additional References

• https://access.redhat.com/security/cve/CVE-2026-20736
• https://bugzilla.redhat.com/show_bug.cgi?id=2432205
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-20736.json

References

• https://github.com/go-gitea/gitea/security/advisories/GHSA-jr6h-pwwp-c8g6
• https://github.com/go-gitea/gitea/pull/36320
• https://github.com/go-gitea/gitea/releases/tag/v1.25.4
• https://blog.gitea.com/release-of-1.25.4/

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