Home/CVE/Gitea does not properly validate repository ownership when linking attachments to releases. An attachment uploaded to a
CVE

CVE-2026-20912

Gitea does not properly validate repository ownership when linking attachments to releases. An attachment uploaded to a

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.

CRITICAL · CVSS 9.1 EPSS 0.00021
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-284Improper Access Control
CWE-639Authorization Bypass Through User-Controlled Key
▤

Affected Products & Versions

1
gitea< 1.25.4
▤

Affected Packages

2
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Go code.gitea.io/gitea fixed in 1.25.4
Go github.com/go-gitea/gitea MODERATE fixed in 1.25.4
▣

Scoring & Timeline

9.1
CRITICAL · CVSS v3.1 · 88ee5874-cf24-4952-aea0-31affedb7ff2
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD22 Jan 2026 · 10:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://blog.gitea.com/release-of-1.25.4/Release Notes
https://github.com/go-gitea/gitea/pull/36320Issue TrackingPatch
https://github.com/go-gitea/gitea/pull/36355Issue TrackingPatch
https://github.com/go-gitea/gitea/releases/tag/v1.25.4Release Notes
https://github.com/go-gitea/gitea/security/advisories/GHSA-vfmv-f93v-37mwBroken Link
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