CVE-2026-20736 Gitea Web Attachment Deletion: Cross-Repository Unauthorized Deletion via Missing Repo Ownership Check

What is CVE-2026-20736?

CVE-2026-20736 is a high-severity missing authorization vulnerability in Gitea Gitea, published on 22 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-284

Which versions are affected by CVE-2026-20736?

4 open source packages ship an affected version, including code.gitea.io/gitea and gitea. It affects 1 product.

Products include Gitea Gitea.

How do I fix CVE-2026-20736?

Upgrade code.gitea.io/gitea to 1.25.4 or later.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-20736 being exploited?

There is no known exploitation of CVE-2026-20736 in the wild and no public exploit code.

Other vulnerabilities in Gitea Gitea

• CVE-2026-60004 Gitea Code Injection Exploited Critical 9.8
• CVE-2026-73278 Gitea WebAuthn bypass during OAuth and OIDC sign-in Critical 9.8
• CVE-2026-94205 Gitea fork workflow approval bypass through maintainer-triggered events Critical 9.8
• CVE-2022-42968 Gitea vulnerable to Argument Injection Critical 9.8
• CVE-2021-45330 Improper Privilege Management in Gitea Critical 9.8

All Gitea Gitea vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• GitHub advisory
• How this page is made

Also known as BIT-gitea-2026-20736, GHSA-hgr3-x44x-33hx, GHSA-jr6h-pwwp-c8g6, GO-2026-4367.