CVE-2026-58438
Description
A flaw was found in Gitea. This vulnerability, identified as an Insecure Direct Object Reference (IDOR), exists within the issue-dependency removal function. A remote attacker with write access to issues in one repository can exploit this flaw to remove a dependency link to an issue in a private repository they are not authorized to access. This allows the attacker to tamper with issue-tracking states and inject comments into private repositories, leading to unauthorized write operations across private repository boundaries.
Statement
A flaw was found in Gitea's issue-dependency removal logic. Due to insufficient authorization checks, a remote user with issue-write access in one repository can manipulate dependency relations pointing to an issue in a separate, restricted private repository. An attacker can exploit this IDOR flaw by targeting known issue IDs to remove dependency links and inject unauthorized system comments into private repositories beyond their permitted access scope, compromising cross-repository data integrity.
Mitigation
To mitigate this issue, restrict write access to repository issues to trusted users, or temporarily disable issue tracking on affected repositories until a patch is applied.
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 | 6.5 | N/A | 7.5 |
| 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 | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | High |
| Integrity Impact | High | N/A | None |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Understanding the Weakness (CWE)
Access Control
Technical Impact: Bypass Protection Mechanism
Access control checks for specific user data or functionality can be bypassed.
Access Control
Technical Impact: Gain Privileges or Assume Identity
Horizontal escalation of privilege is possible (one user can view/modify information of another user).
Access Control
Technical Impact: Gain Privileges or Assume Identity
Vertical escalation of privilege is possible if the user-controlled key is actually a flag that indicates administrator status, allowing the attacker to gain administrative access.
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