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CVE-2026-20904— Gitea: Broken access control in OpenID visibility toggle enables cross-user visibility changes

Quick assessment

Affected
Gitea Gitea Open Source Git Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Gitea是Gitea社区的一个基于Go开发的轻量型git服务。 Gitea存在安全漏洞，该漏洞源于切换OpenID URI可见性时未正确验证所有权，可能导致经过身份验证的用户更改其他用户的OpenID身份可见性设置。

AI Predicted 4.3 Difficulty: Easy EPSS 0.31% · P21

Possible ATT&CK Techniques 1 AI

T1098.004 · SSH Authorized Keys
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I. Basic Information for CVE-2026-20904

Vulnerability Information
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Vulnerability Title
Gitea: Broken access control in OpenID visibility toggle enables cross-user visibility changes
Source: CVE Program / CVE List V5
Vulnerability Description
Gitea does not properly validate ownership when toggling OpenID URI visibility. An authenticated user may be able to change the visibility settings of other users' OpenID identities.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Gitea 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Gitea是Gitea社区的一个基于Go开发的轻量型git服务。 Gitea存在安全漏洞，该漏洞源于切换OpenID URI可见性时未正确验证所有权，可能导致经过身份验证的用户更改其他用户的OpenID身份可见性设置。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Gitea Gitea Open Source Git Server 0 ~ 1.25.3 -

II. Public POCs for CVE-2026-20904

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III. Intelligence Information for CVE-2026-20904

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Security Blog Posts for CVE-2026-20904 (1)

Same Patch Batch · Gitea · 2026-01-22 · 9 CVEs total

CVE-2026-0798 Gitea Release Email Notifications Leak Private Repository Release Details After Access Rev
CVE-2026-20912 Gitea: Cross-Repository Authorization Bypass via Release Attachment Linking Leads to Priva
CVE-2026-20883 Gitea Stopwatch API Missing Authorization Check Leads to Post-Revocation Information Discl
CVE-2026-20750 Gitea Organization Projects Cross-Organization Authorization Bypass via Project ID (IDOR)
CVE-2026-20888 Gitea Pull Requests Auto-Merge: Read-Only Users Can Cancel Scheduled Auto-Merge via Web En
CVE-2026-20800 Notification API Leaks Private Repository Issue Titles After Collaborator Permission Revoc
CVE-2026-20897 Gitea Git LFS Lock Deletion Broken Access Control (Cross-Repo IDOR)
CVE-2026-20736 Gitea Web Attachment Deletion: Cross-Repository Unauthorized Deletion via Missing Repo Own

IV. Related Vulnerabilities

Same product: Gitea Open Source Git Server
Same vendor: Gitea
Same weakness: CWE-284

V. Comments for CVE-2026-20904

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