GitLab CE/EE: Authenticated Proxy Request via Import (18.7.6/18.8.6/18.9.2)
CVE-2026-3848 Published on March 11, 2026
Improper Neutralization of CRLF Sequences ('CRLF Injection') in GitLab
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.
Vulnerability Analysis
CVE-2026-3848 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity and availability.
Weakness Type
What is a CRLF Injection Vulnerability?
The software uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.
CVE-2026-3848 has been classified to as a CRLF Injection vulnerability or weakness.
Products Associated with CVE-2026-3848
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Affected Versions
GitLab:- Version 8.11 and below 18.7.6 is affected.
- Version 18.8 and below 18.8.6 is affected.
- Version 18.9 and below 18.9.2 is affected.