CVE-2025-6454

An issue has been discovered in GitLab CE/EE affecting all versions from 16.11 before 18.1.6, 18.2 before 18.2.6, and 18.3 before 18.3.2 that could have allowed authenticated users to make unintended internal requests through proxy environments by injecting crafted sequences.

CVSS 3.1

8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.7% chance of exploitation in the next 30 days; higher than 54% of CVEs (scores of 2026-10-25)

CWE

CWE-918

Published

2025-09-12

Modified

2026-10-19

Record from

the NVD, synced 2026-10-19

Affected

• gitlab:gitlab

References

• https://about.gitlab.com/releases/2025/09/10/patch-release-gitlab-18-3-2-released/
• https://gitlab.com/gitlab-org/gitlab/-/issues/550766
• https://hackerone.com/reports/3162711

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