🔐 CVE Alert

CVE-2026-12635

UNKNOWN 0.0

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

CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th

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.

CWE CWE-350
Vendor gitlab
Product gitlab
Ecosystems
Industries
Technology
Published Jun 25, 2026
Last Updated Jun 25, 2026
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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:N
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
None

Affected Versions

GitLab / GitLab
8.3 < 18.11.6 19.0 < 19.0.3 19.1 < 19.1.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗
gitlab.com: https://gitlab.com/gitlab-org/gitlab/-/work_items/594321 docs.gitlab.com: https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-1-1-released/

Credits

This vulnerability has been discovered internally by GitLab team member Félix Veillette-Potvin