What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-06 · updated 2026-10-13
• Weakness: CWE-400

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.

Affected products

• Gitea Open Source Git Server: before 28.1.0 — fixed in 28.1.0

How to fix

Upgrade to a fixed version: Gitea Open Source Git Server 28.1.0. Check the vendor advisory for mitigations.

References

• https://blog.gitea.com/release-of-28.1.0/
• https://github.com/go-gitea/gitea/pull/39501
• https://github.com/go-gitea/gitea/pull/39507
• https://github.com/go-gitea/gitea/releases/tag/v28.1.0
• https://github.com/go-gitea/gitea/security/advisories/GHSA-jj5r-9rpc-8h6h

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