CVE-2026-12635

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.

EPSS — Exploit Prediction

0.0015

Probability of exploitation

0.05%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-350 CWE-350

Affected Products

Vendor	Product	Versions
gitlab	gitlab	8.3.0 — 18.11.6
gitlab	gitlab	19.0.0 — 19.0.3
gitlab	gitlab	All

References

Advisories & Patches

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

Other References

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

Frequently Asked Questions

What is CVE-2026-12635? +

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.

What products are affected by CVE-2026-12635? +

CVE-2026-12635 affects products from gitlab, specifically: gitlab. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-12635? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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