CVE-2026-104633 Gitea migration memory exhaustion from zero page size

What is CVE-2026-104633?

CVE-2026-104633 is a medium-severity denial of service 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 migrating a repository from another Gitea instance, Gitea used the page size reported in the source server's API settings to end its paginated downloads. A source that reported `max_response_items` as `0` made these loops run indefinitely and grow server memory until it was exhausted. Any user who can migrate repositories could point a migration at a server they control and cause a denial of service.

Weakness: CWE-835, CWE-400

Which versions are affected by CVE-2026-104633?

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

Products include Gitea Gitea.

How do I fix CVE-2026-104633?

Upgrade gitea to 28.1.0 or later.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-104633 being exploited?

There is no known exploitation of CVE-2026-104633 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-2026-104633, GHSA-jj5r-9rpc-8h6h, MINI-3g88-h77w-4vgf, MINI-57xj-5qch-7pfc.