CVE-2026-13319: gitlab — Fix

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.10 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, could have allowed an authenticated to read milestone metadata, including titles, descriptions, and full project paths, from arbitrary private projects across the instance without any project membership, due to missing authorization checks on a user-supplied project filter parameter in the group milestones API.

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CVSS v3.1 Score

4.3

MEDIUM

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

EPSS — Exploit Prediction

0.0024

Probability of exploitation

0.15%

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-639 CWE-639

Affected Products

Vendor	Product	Versions
gitlab	gitlab	15.10 — 19.3.6
gitlab	gitlab	15.10 — 19.3.6
gitlab	gitlab	19.4.0 — 19.4.3
gitlab	gitlab	19.4.0 — 19.4.3
gitlab	gitlab	All
gitlab	gitlab	All

References

Advisories & Patches

https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/

Other References

https://gitlab.com/gitlab-org/gitlab/-/work_items/604064 https://hackerone.com/reports/3792168

Frequently Asked Questions

What is CVE-2026-13319? +

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.10 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, could have allowed an authenticated to read milestone metadata, including titles, descriptions, and full project paths, from arbitrary private projects across the instance without any project membership, due to missing authorization checks on a user-supplied project filter parameter in the group milestones API. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2026-13319? +

CVE-2026-13319 has a CVSS v3.1 score of 4.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0024, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-13319? +

CVE-2026-13319 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-2026-13319? +

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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