What’s Vulnerable › Vulnerabilities

CVE-2026-3848: Improper Neutralization of CRLF Sequences ('CRLF Injection') in GitLab

• Severity: medium (CVSS 5.0 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: 2026-03-11 · updated 2026-06-17
• Weakness: CWE-93

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 8.11 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2 that could have allowed an authenticated user to make unintended internal requests through proxy environments under certain conditions due to improper input validation in import functionality.

Affected products

• GitLab: from 8.11.0 before 18.7.6; from 18.8.0 before 18.8.6; from 18.9.0 before 18.9.2 — fixed in 18.7.6, 18.8.6, 18.9.2

How to fix

Upgrade to a fixed version: GitLab 18.7.6, 18.8.6, 18.9.2. Check the vendor advisory for mitigations.

References

• https://about.gitlab.com/releases/2026/03/11/patch-release-gitlab-18-9-2-released/
• https://gitlab.com/gitlab-org/gitlab/-/work_items/577298

Get alerted when CVE-2026-3848 or the next vulnerability affects your stack