CVE-2026-12635

NONE

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

Title source: cna

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.

References (2)

Core 2

Core References

https://gitlab.com/gitlab-org/gitlab/-/work_items/594321

https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-1-1-released/

Scores

CVSS v3 0.0

EPSS 0.0016

EPSS Percentile 5.7%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-350

Status published

Products (5)

gitlab/gitlab 19.1.0

GitLab/GitLab 19.0 - 19.0.3

GitLab/GitLab 19.1 - 19.1.1

GitLab/GitLab 8.3 - 18.11.6

gitlab/gitlab 8.3.0 - 18.11.6

Published Jun 25, 2026

Tracked Since Jun 25, 2026