CVE-2026-3848 PUBLISHED

Improper Neutralization of CRLF Sequences ('CRLF Injection') in GitLab

Assigner: GitLab
Reserved: 09.03.2026 Published: 11.03.2026 Updated: 11.03.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
CVSS Score: 5

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	Low	Integrity Impact	None
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	GitLab
Product	GitLab
Versions	Default: unaffected affected from 8.11 to 18.7.6 (excl.) affected from 18.8 to 18.8.6 (excl.) affected from 18.9 to 18.9.2 (excl.)

Solutions

Upgrade to versions 18.7.6, 18.8.6, 18.9.2 or above.

Credits

Thanks [shelld3c](https://hackerone.com/shells3c) for reporting this vulnerability. finder

References

Problem Types

CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection') CWE