CVE-2026-16553: Insufficiently Protected Credentials in GitLab

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-29 · updated 2026-08-03
Weakness: CWE-522

Description

GitLab has remediated an issue in GitLab EE affecting all versions from 18.8 before 19.0.5, 19.1 before 19.1.3, and 19.2 before 19.2.1 that under certain conditions could have allowed some sensitive information to be disclosed to an unintended host due to improper handling of upstream requests in virtual registries.

Affected products

GitLab: from 18.8.0 before 19.0.5; from 19.1.0 before 19.1.3; 19.2.0 — fixed in 19.0.5, 19.1.3

How to fix

Upgrade to a fixed version: GitLab 19.0.5, 19.1.3. Check the vendor advisory for mitigations.

References

https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-2-1-released/
https://gitlab.com/gitlab-org/gitlab/-/work_items/603269

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