CVE-2026-1606: Improper Control of Generation of Code ('Code Injection') in GitLab

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-25 · updated 2026-06-26
Weakness: CWE-94

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 14.8 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 to conceal content within a Snippet due to improper input validation.

Affected products

GitLab: from 14.8.0 before 18.11.6; from 19.0.0 before 19.0.3; 19.1.0 — fixed in 18.11.6, 19.0.3

How to fix

Upgrade to a fixed version: GitLab 18.11.6, 19.0.3. Check the vendor advisory for mitigations.

References

https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-1-1-released/
https://gitlab.com/gitlab-org/gitlab/-/work_items/588128
https://hackerone.com/reports/3527473

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