CVE-2026-73273: Gitea Maven checksum upload quota bypass and memory exhaustion

Severity: medium (CVSS 4.3 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: 2026-10-14 · updated 2026-10-14
Weakness: CWE-770

Description

Gitea's Maven upload handler reads checksum uploads entirely into memory and returns before enforcing package-size quotas. An authenticated user with package-publish permission can submit an oversized body to a checksum endpoint despite legitimate checksum values being at most 128 bytes. This bypasses the upload quota on that path and can exhaust server memory.

Affected products

Gitea Open Source Git Server: through 1.27.2

References

https://blog.gitea.com/release-of-1.27.3/
https://github.com/go-gitea/gitea/pull/39028
https://github.com/go-gitea/gitea/pull/39031
https://github.com/go-gitea/gitea/releases/tag/v1.27.3
https://github.com/go-gitea/gitea/security/advisories/GHSA-5xcq-p92v-43rf

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