CVE-2026-100104: gitlab SSRF — Fix

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.3 before 19.2.8, 19.3 before 19.3.5, and 19.4 before 19.4.2 that, under certain conditions, could have allowed an authenticated user to perform server-side request forgery and reach internal network resources due to a time-of-check to time-of-use race condition in URL validation during repository import operations.

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CVSS v3.1 Score

3.5

LOW

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

EPSS — Exploit Prediction

0.0019

Probability of exploitation

0.08%

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-918 Server-Side Request Forgery (SSRF)

Affected Products

Vendor	Product	Versions
gitlab	gitlab	10.3.0 — 19.2.8
gitlab	gitlab	10.3.0 — 19.2.8
gitlab	gitlab	19.3.0 — 19.3.5
gitlab	gitlab	19.3.0 — 19.3.5
gitlab	gitlab	19.4.0 — 19.4.2
gitlab	gitlab	19.4.0 — 19.4.2

References

Advisories & Patches

https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-4-2-released/

Other References

https://gitlab.com/gitlab-org/gitlab/-/work_items/594194

Frequently Asked Questions

What is CVE-2026-100104? +

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.3 before 19.2.8, 19.3 before 19.3.5, and 19.4 before 19.4.2 that, under certain conditions, could have allowed an authenticated user to perform server-side request forgery and reach internal network resources due to a time-of-check to time-of-use race condition in URL validation during repository import operations. It has a CVSS v3.1 base score of 3.5 (LOW).

How severe is CVE-2026-100104? +

CVE-2026-100104 has a CVSS v3.1 score of 3.5 out of 10, rated LOW. This is a low-severity vulnerability with limited impact. The EPSS score is 0.0019, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-100104? +

CVE-2026-100104 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-2026-100104? +

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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