CVE-2026-101027 Gitea migration SSRF through ALLOWED_DOMAINS address check bypass

What is CVE-2026-101027?

CVE-2026-101027 is a high-severity server-side request forgery vulnerability in Gitea Gitea, published on 6 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

When `[migrations] ALLOWED_DOMAINS` was configured, a hostname matching the allow list was accepted without checking its resolved address against the local-network restrictions. A user who can start repository migrations and control the DNS of an allowed hostname could make it resolve to loopback or private addresses and bypass `ALLOW_LOCALNETWORKS = false`, reaching internal services from the Gitea server. Instances without `ALLOWED_DOMAINS` configured are not affected by this specific bypass.

Weakness: CWE-346

Which versions are affected by CVE-2026-101027?

1 open source package ship an affected version, including gitea. It affects 1 product.

Products include Gitea Gitea.

How do I fix CVE-2026-101027?

Upgrade gitea to 28.0.0 or later.

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

Is CVE-2026-101027 being exploited?

There is no known exploitation of CVE-2026-101027 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-2026-101027, GHSA-fqjr-23c8-gg9m, MINI-cx62-rhf2-fx26, MINI-gr2v-v628-56qc.