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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.

PUBLISHED Reserved 2026-03-09 | Published 2026-03-11 | Updated 2026-03-11 | Assigner GitLab




MEDIUM: 5.0CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

Problem types

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

Product status

Default status
unaffected

8.11 (semver) before 18.7.6
affected

18.8 (semver) before 18.8.6
affected

18.9 (semver) before 18.9.2
affected

Credits

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

References

gitlab.com/gitlab-org/gitlab/-/work_items/577298

about.gitlab.com/...11/patch-release-gitlab-18-9-2-released/

cve.org (CVE-2026-3848)

nvd.nist.gov (CVE-2026-3848)

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