CVE-2026-20736— Gitea Web Attachment Deletion: Cross-Repository Unauthorized Deletion via Missing Repo Ownership Check
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I. Basic Information for CVE-2026-20736
Vulnerability Information
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Vulnerability Title
Gitea Web Attachment Deletion: Cross-Repository Unauthorized Deletion via Missing Repo Ownership Check
Source: NVD (National Vulnerability Database)
Vulnerability Description
Gitea does not properly verify repository context when deleting attachments. A user who previously uploaded an attachment to a repository may be able to delete it after losing access to that repository by making the request through a different repository they can access.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
访问控制不恰当
Source: NVD (National Vulnerability Database)
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，该漏洞源于删除附件时未正确验证仓库上下文，可能导致用户在失去对某个仓库的访问权限后，仍可通过其可访问的其他仓库发起请求删除附件。
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)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Gitea | Gitea Open Source Git Server | 0 ~ 1.25.3 | - |
II. Public POCs for CVE-2026-20736
| # | POC Description | Source Link | Shenlong Link |
|---|
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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-2026-20904 | Gitea: Broken access control in OpenID visibility toggle enables cross-user visibility cha | |
| 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) |
IV. Related Vulnerabilities
Same product: Gitea Open Source Git Server
- CVE-2026-20897
Gitea Git LFS Lock Deletion Broken Access Control (Cross-Rep - CVE-2026-20912
Gitea: Cross-Repository Authorization Bypass via Release Att - CVE-2026-20904
Gitea: Broken access control in OpenID visibility toggle ena - CVE-2026-20888
Gitea Pull Requests Auto-Merge: Read-Only Users Can Cancel S - CVE-2026-20883
Gitea Stopwatch API Missing Authorization Check Leads to Pos
Same vendor: Gitea
- CVE-2026-20897
Gitea Git LFS Lock Deletion Broken Access Control (Cross-Rep - CVE-2026-20912
Gitea: Cross-Repository Authorization Bypass via Release Att - CVE-2026-20904
Gitea: Broken access control in OpenID visibility toggle ena - CVE-2026-20888
Gitea Pull Requests Auto-Merge: Read-Only Users Can Cancel S - CVE-2026-20883
Gitea Stopwatch API Missing Authorization Check Leads to Pos
Same weakness: CWE-284
- CVE-2026-8233
Dotouch XproUPF access control - CVE-2026-42569
phpvms: /importer authorization bypass causing full database - CVE-2026-42205
Avo: Broken Access Control: Unauthorized Execution of Arbitr - CVE-2026-41487
Langfuse: Improper role-based-access control in Langfuse LLM - CVE-2026-42278
UltraDAG: Smart Account Spending Policy Bypass via Pockets
V. Comments for CVE-2026-20736
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