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Vulnerability · Published Jan 22, 2026 · Assigned by Gitea

CVE-2026-20912Gitea: Cross-Repository Authorization Bypass via Release Attachment Linking Leads to Private Attachment Disclosure

Critical 9.1

In plain English

A critical-severity improper access control in Gitea Open Source Git Server from Gitea. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.1Critical
Exploit odds (30 days)0.5%top 60.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Gitea does not properly validate repository ownership when linking attachments to releases. An attachment uploaded to a private repository could potentially be linked to a release in a different public repository, making it accessible to unauthorized users.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Gocode.gitea.io/gitea1.25.4GO-2026-4364
Gogithub.com/go-gitea/gitea1.25.4GHSA-4xx9-vc8v-87hv

Affected products (as reported)

VendorProductVersions
Gitea Gitea Open Source Git Server 0 – through 1.25.3

Weakness: CWE-284, CWE-639, CWE-283 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References