CVE-2026-58443: CWE-863 in Gitea Gitea Open Source Git Server
Public-only repository tokens can update private PR head branches
AI Analysis
Technical Summary
CVE-2026-58443 in Gitea allows a token restricted to public repositories with write permissions to update the head branch of a private pull request. The issue arises because the public-only restriction is checked against the public base repository route but is not re-applied when updating the private head repository branch. This flaw enables the token to push changes into private branches indirectly, bypassing intended access controls and leading to unauthorized code modifications in private repositories.
Potential Impact
The vulnerability enables an attacker with a token limited to public repositories to modify private pull request head branches, resulting in unauthorized code changes in private repositories. This can compromise the integrity of private codebases and potentially disrupt development workflows. The CVSS score of 9.6 indicates a critical severity with high impact on integrity and availability.
Mitigation Recommendations
A patch is available for this vulnerability. Users should upgrade Gitea to version 1.27.0 or later to remediate this issue. Applying the official fix will enforce proper access control checks on private pull request head branches, preventing unauthorized updates via public-only tokens.
CVE-2026-58443: CWE-863 in Gitea Gitea Open Source Git Server
Description
Public-only repository tokens can update private PR head branches
CVSS v3.1
Score 9.1critical
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-58443 in Gitea allows a token restricted to public repositories with write permissions to update the head branch of a private pull request. The issue arises because the public-only restriction is checked against the public base repository route but is not re-applied when updating the private head repository branch. This flaw enables the token to push changes into private branches indirectly, bypassing intended access controls and leading to unauthorized code modifications in private repositories.
Potential Impact
The vulnerability enables an attacker with a token limited to public repositories to modify private pull request head branches, resulting in unauthorized code changes in private repositories. This can compromise the integrity of private codebases and potentially disrupt development workflows. The CVSS score of 9.6 indicates a critical severity with high impact on integrity and availability.
Mitigation Recommendations
A patch is available for this vulnerability. Users should upgrade Gitea to version 1.27.0 or later to remediate this issue. Applying the official fix will enforce proper access control checks on private pull request head branches, preventing unauthorized updates via public-only tokens.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-xxjv-752h-3vp2
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-58443"]
- Ecosystems
- ["Go"]
- Database Specific Severity
- CRITICAL
- Cvss Version
- 3.1
Threat ID: 6a600ab79c2644c7f8fe24f9
Added to database: 07/22/2026, 00:11:35 UTC
Last enriched: 08/14/2026, 13:00:10 UTC
Last updated: 09/04/2026, 23:01:31 UTC
Views: 296
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