CVE-2026-20800 Notification API Leaks Private Repository Issue Titles After Collaborator Permission Revocation

What is CVE-2026-20800?

CVE-2026-20800 is a medium-severity vulnerability in Gitea Gitea, published on 22 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Gitea's notification API does not re-validate repository access permissions when returning notification details. After a user's access to a private repository is revoked, they may still view issue and pull request titles through previously received notifications.

Weakness: CWE-200

Which versions are affected by CVE-2026-20800?

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

Products include Gitea Gitea.

How do I fix CVE-2026-20800?

Upgrade github.com/go-gitea/gitea to 1.25.4 or later.

Is CVE-2026-20800 being exploited?

There is no known exploitation of CVE-2026-20800 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-2026-20800, GHSA-2vgv-hgv4-22mh, GHSA-g54m-9f6g-wj7q, GO-2026-4362.