CVE-2026-27780: Incorrect Authorization in Gitea Gitea Open Source Git Server
Gitea versions prior to 1.26.0 contain an authorization vulnerability where errors in bufio.Scanner during pre-receive hook input processing do not cause the system to fail closed. This allows oversized input to bypass branch-protection checks, potentially undermining repository security controls.
AI Analysis
Technical Summary
CVE-2026-27780 is an authorization vulnerability in Gitea Open Source Git Server affecting versions before 1.26.0. The issue arises because the application does not fail closed when bufio.Scanner encounters errors processing pre-receive hook input. As a result, oversized input can bypass branch-protection mechanisms, which are intended to restrict unauthorized changes to protected branches.
Potential Impact
The vulnerability allows attackers to circumvent branch-protection checks by submitting oversized input that triggers bufio.Scanner errors. This could lead to unauthorized modifications on protected branches, weakening repository integrity and access controls.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider restricting access to trusted users and monitoring repository changes closely to mitigate potential abuse.
CVE-2026-27780: Incorrect Authorization in Gitea Gitea Open Source Git Server
Description
Gitea versions prior to 1.26.0 contain an authorization vulnerability where errors in bufio.Scanner during pre-receive hook input processing do not cause the system to fail closed. This allows oversized input to bypass branch-protection checks, potentially undermining repository security controls.
Affected software
pkg:golang/github.com/go-gitea/giteaRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-27780 is an authorization vulnerability in Gitea Open Source Git Server affecting versions before 1.26.0. The issue arises because the application does not fail closed when bufio.Scanner encounters errors processing pre-receive hook input. As a result, oversized input can bypass branch-protection mechanisms, which are intended to restrict unauthorized changes to protected branches.
Potential Impact
The vulnerability allows attackers to circumvent branch-protection checks by submitting oversized input that triggers bufio.Scanner errors. This could lead to unauthorized modifications on protected branches, weakening repository integrity and access controls.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider restricting access to trusted users and monitoring repository changes closely to mitigate potential abuse.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Gitea
- Date Reserved
- 2026-03-03T03:25:28.724Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a4820fe27e9c79719acc083
Added to database: 07/03/2026, 20:52:14 UTC
Last enriched: 07/03/2026, 21:02:48 UTC
Last updated: 07/03/2026, 23:01:11 UTC
Views: 3
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