CVE-2026-12635

Reliance on Reverse DNS Resolution for a Security-Critical Action in GitLab

Published Jun 25, 2026 CVSS 3.1 · 0 Low EPSS < 1% KEV · Not listed
Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 8.3 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1 that under certain conditions could have allowed an authenticated user with maintainer-role permissions to make requests to internal network resources through mirror synchronization due to improper URL validation.

Remediation

Vendor Solution

Upgrade to versions 18.11.6, 19.0.3, 19.1.1 or above.

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description GitLab has remediated an issue in GitLab CE/EE affecting all versions from 8.3 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1 that under certain conditions could have allowed an authenticated user with maintainer-role permissions to make requests to internal network resources through mirror synchronization due to improper URL validation.
Title Reliance on Reverse DNS Resolution for a Security-Critical Action in GitLab
First Time appeared Gitlab
Gitlab gitlab
Weaknesses CWE-350
CPEs cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
Vendors & Products Gitlab
Gitlab gitlab
References
Metrics cvssV3_1

{'score': 0, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitLab
Published
Updated
Jun 25, 2026, 1:25 PM
Reserved
Jun 18, 2026, 3:33 PM
Status
Analyzed
Published
Jun 25, 2026, 5:16 AM
Modified
Jun 26, 2026, 6:29 PM