CVE-2026-105711: Use of Cache Containing Sensitive Information in GitLab

Severity: low (CVSS 3.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-21 · updated 2026-10-30
Weakness: CWE-524

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.0 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, when a merge request in a public project referenced a confidential issue from a private project, an authenticated user with no project membership could have read the confidential issue's title, due to a viewer-independent fragment cache key that incorrectly shared per-user-redacted rendered content across all users.

Affected products

GitLab: from 15.0.0 before 19.3.6; from 19.4.0 before 19.4.3; 19.5.0 (and their updates) — fixed in 19.3.6, 19.4.3
GitLab: from 15.0 before 19.3.6; from 19.4 before 19.4.3; from 19.5 before 19.5.1 — fixed in 19.3.6, 19.4.3, 19.5.1

How to fix

Upgrade to a fixed version: GitLab 19.3.6, 19.4.3; GitLab 19.3.6, 19.4.3, 19.5.1. Check the vendor advisory for mitigations.

References

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