CVE-2026-20912: Gitea Open Source Git Server · Improper Access Control
Affects Gitea Open Source Git ServerSource CVE Database V5
Not known to be exploited · CVSS 9.1 Critical.
Data as of 26 Oct 2026, 09:16 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 39% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:NExploitation evidence
Disclosed: evidence found.
CVE published 22 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| GiteaGitea Open Source Git Server | Affected
| Fixed in– |
AI-suggested
Users should monitor the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-20912 for updates on patches or official mitigations. Until a fix is available, restrict repository release attachment operations to trusted users and review repository permissions carefully to minimize exposure risk.
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.
References
- github.com/go-gitea/gitea/security/advisories/GHSA-vfmv-f93v-37mw (opens in a new tab)
- github.com/go-gitea/gitea/pull/36320 (opens in a new tab)
- github.com/go-gitea/gitea/pull/36355 (opens in a new tab)
- github.com/go-gitea/gitea/releases/tag/v1.25.4 (opens in a new tab)
- blog.gitea.com/release-of-1.25.4/ (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-20912 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2432219 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-20912.json (opens in a new tab)