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Vulnerability record · CVE-2026-20912 · published 22 January 2026

CVE-2026-20912: Gitea improper access control vulnerability

Gitea · Gitea

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.

9.1 CVSS 3.1 Critical EPSS 0.46% · top 62.5% CWE-284 · Improper access controlCWE-639 · Insecure direct object reference
9.1CVSS 3.1 base score
0.46%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
15 Jul 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://blog.gitea.com/release-of-1.25.4/ Release Notes
https://github.com/go-gitea/gitea/pull/36320 Issue TrackingPatch
https://github.com/go-gitea/gitea/pull/36355 Issue TrackingPatch
https://github.com/go-gitea/gitea/releases/tag/v1.25.4 Release Notes
https://github.com/go-gitea/gitea/security/advisories/GHSA-vfmv-f93v-37mw Broken Link
https://access.redhat.com/security/cve/CVE-2026-20912
https://bugzilla.redhat.com/show_bug.cgi?id=2432219
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-20912.json

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-60004Gitea diffpatch API code injection enables remote code executionGitea before 1.27.1 allows remote code execution through the diffpatch API by way of Git hook installation. The flaw is a code injection issue (CWE-9…KEVEPSS 24%analysed9.8CVE-2022-42968Gitea argument injection vulnerabilityGitea before 1.17.3 does not sanitize and escape refs in the git backend. Arguments to git commands are mishandled.EPSS 1.2%9.8CVE-2021-45331Gitea improper authentication vulnerabilityAn Authentication Bypass vulnerability exists in Gitea before 1.5.0, which could let a malicious user gain privileges. If captured, the TOTP code for…EPSS 1.4%9.8CVE-2021-45330Gitea vulnerabilityAn issue exsits in Gitea through 1.15.7, which could let a malicious user gain privileges due to client side cookies not being deleted and the sessio…EPSS 1.4%9.8CVE-2021-45327Gitea interpretation conflict vulnerabilityGitea before 1.11.2 is affected by Trusting HTTP Permission Methods on the Server Side when referencing the vulnerable admin or user API. which could…EPSS 2.1%9.8CVE-2020-28991Gitea vulnerabilityGitea 0.9.99 through 1.12.x before 1.12.6 does not prevent a git protocol path that specifies a TCP port number and also contains newlines (with URL …EPSS 1.7%9.8CVE-2019-11576Gitea improper authentication vulnerabilityGitea before 1.8.0 allows 1FA for user accounts that have completed 2FA enrollment. If a user's credentials are known, then an attacker could send th…EPSS 1.8%9.8CVE-2018-18926Gitea vulnerabilityGitea before 1.5.4 allows remote code execution because it does not properly validate session IDs. This is related to session ID handling in the go-m…EPSS 3.0%

Source: NIST National Vulnerability Database (record CVE-2026-20912), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.