CVE-2026-58443
Description
A flaw was found in Gitea. This vulnerability allows an attacker to use tokens intended for public repositories to modify private pull request (PR) branches. This could lead to unauthorized changes in private code, compromising the integrity of the affected repositories.
Statement
A flaw was found in Gitea where public-only repository tokens can be used to write to private pull request head branches. This authorization bypass allows an attacker with a valid public-only write:repository token to modify private repository branches through public base repository API endpoints, bypassing the public-only token restriction. This could lead to unauthorized changes in private code, compromising the integrity of affected repositories and potentially triggering private workflow executions when Actions is enabled.
Mitigation
Update to Gitea 1.27.0 or later. As a workaround, restrict the use of public-only tokens in environments where both public and private repositories with pull request relationships exist, or implement additional access controls at the API gateway level to prevent access to pull request update endpoints.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 9.6 | N/A | 9.1 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | Low | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Changed | N/A | Unchanged |
| Confidentiality | None | N/A | None |
| Integrity Impact | High | N/A | High |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Red Hat CVSS v3 Score Explanation
Corrected from CISA vector (PR:N→PR:L requires token, S:U→S:C affects private repos beyond public scope). Based on upstream GHSA-xxjv-752h-3vp2.
Understanding the Weakness (CWE)
Access Control
Technical Impact: Gain Privileges or Assume Identity
A user can access restricted functionality and/or sensitive information that may include administrative functionality and user accounts.
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