CVE-2020-28991 Improper Access Control in Gitea

What is CVE-2020-28991?

CVE-2020-28991 is a critical server-side request forgery vulnerability in Gitea Gitea, published on 24 Nov 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Gitea 0.9.99 through 1.12.x before 1.12.6 does not prevent a git protocol path that specifies a TCP port number and also contains newlines (with URL encoding) in ParseRemoteAddr in modules/auth/repo_form.go.

Which versions are affected by CVE-2020-28991?

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

Products include Gitea Gitea.

How do I fix CVE-2020-28991?

Upgrade github.com/go-gitea/gitea to 1.12.6 or later.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2020-28991 being exploited?

There is no known exploitation of CVE-2020-28991 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
• How this page is made

Also known as BIT-gitea-2020-28991, GHSA-r7h7-chh4-5rvm.