CVE-2025-3950: Exposure of Private Personal Information to an Unauthorized Actor in GitLab

Severity: low (CVSS 3.5 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: 2026-01-09 · updated 2026-06-17
Weakness: CWE-359

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.3 before 18.5.5, 18.6 before 18.6.3, and 18.7 before 18.7.1 that could have allowed a user to leak certain information by referencing specially crafted images that bypass asset proxy protection.

Affected products

GitLab: from 10.3.0 before 18.5.5; from 18.6.0 before 18.6.3; from 18.7.0 before 18.7.1 — fixed in 18.5.5, 18.6.3, 18.7.1

How to fix

Upgrade to a fixed version: GitLab 18.5.5, 18.6.3, 18.7.1. Check the vendor advisory for mitigations.

References

https://about.gitlab.com/releases/2026/01/07/patch-release-gitlab-18-7-1-released/
https://gitlab.com/gitlab-org/gitlab/-/issues/537697
https://hackerone.com/reports/3106477

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