CVE-2026-3553

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 12.0 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2 that under certain conditions could have allowed an authenticated user to access confidential issue details due to incorrect authorization checks.

CVSS v3.1 Score

3.1

LOW

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

EPSS — Exploit Prediction

0.0031

Probability of exploitation

0.22%

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-863 Incorrect Authorization

Affected Products

Vendor	Product	Versions
gitlab	gitlab	12.0.0 — 18.10.8
gitlab	gitlab	12.0.0 — 18.10.8
gitlab	gitlab	18.11.0 — 18.11.5
gitlab	gitlab	18.11.0 — 18.11.5
gitlab	gitlab	19.0.0 — 19.0.2
gitlab	gitlab	19.0.0 — 19.0.2

References

Other References

https://about.gitlab.com/releases/2026/06/10/patch-release-gitlab-19-0-2-released/ https://gitlab.com/gitlab-org/gitlab/-/work_items/592295 https://hackerone.com/reports/3578216

Frequently Asked Questions

What is CVE-2026-3553? +

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 12.0 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2 that under certain conditions could have allowed an authenticated user to access confidential issue details due to incorrect authorization checks. It has a CVSS v3.1 base score of 3.1 (LOW).

How severe is CVE-2026-3553? +

CVE-2026-3553 has a CVSS v3.1 score of 3.1 out of 10, rated LOW. This is a low-severity vulnerability with limited impact. The EPSS score is 0.0031, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-3553? +

CVE-2026-3553 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-2026-3553? +

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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