CVE-2026-58445

Deferred Deferred - Pending Action

Cross-Repository Label-ID Enumeration via DeleteIssueLabel API

Publication date: 2026-08-13

Last updated on: 2026-08-26

Assigner: Gitea Limited

Description

Cross-repository label-ID enumeration oracle via unscoped DeleteIssueLabel API

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-13

Last Modified

2026-08-26

Generated

2026-09-03

AI Q&A

2026-08-13

EPSS Evaluated

2026-09-02

NVD

CVE-2026-58445

EUVD

EUVD-2026-58172

Affected Vendors & Products

Vendor	Product	Version / Range
gitea	gitea	to 1.26.4 (inc)
go-gitea	gitea	to 1.26.4 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-203	The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.
CWE-639	The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

Attack-Flow Graph

Executive Summary

CVE-2026-58445 is a vulnerability in Gitea affecting versions up to 1.26.4. It involves the DELETE API endpoint for issue labels, which performs a global lookup of label IDs without verifying ownership. This allows authenticated users to check if arbitrary label IDs exist across the entire instance, including private repositories, by observing HTTP status codes. The issue arises because the label loader is unscoped, unlike other endpoints.

Detection Guidance

To detect this vulnerability, monitor HTTP responses from the DELETE /repos/{owner}/{repo}/issues/{index}/labels/{id} API endpoint. Existing labels return 204, while non-existent ones return 422. Automate requests to test label IDs across repositories and observe inconsistent responses.

Impact Analysis

This vulnerability allows attackers with authenticated access to enumerate label IDs across all repositories and organizations on a Gitea instance. While it does not grant unauthorized data access or modification, it could aid in reconnaissance for further attacks by confirming the existence of specific labels in private or restricted areas.

Compliance Impact

This vulnerability does not directly impact compliance with GDPR or HIPAA as it does not allow unauthorized data access, modification, or disclosure of sensitive information. The issue only exposes label existence in private repositories without revealing content or permissions, which is unlikely to violate these standards.

Mitigation Strategies

Upgrade Gitea to a version beyond 1.26.4 where the issue is patched. Ensure the DeleteIssueLabel handler uses repository-scoped label lookups to prevent cross-repository ID enumeration.

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