CVE-2026-105777

Insertion of Sensitive Information Into Sent Data in GitLab

State: Published
Severity: 4.3 Medium
Published: Oct 21, 2026
Updated: Oct 30, 2026
Reserved: Oct 5, 2026

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.6.5 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, under certain conditions, an unauthenticated user could have retrieved sensitive internal server credentials due to improper filtering of internal response headers.

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N	GitLab

Weaknesses

CWE-201 Insertion of Sensitive Information Into Sent Data

Affected Products

Product	Versions
GitLabGitLab	17.6.5 to before 19.3.6Affected 19.4 to before 19.4.3Affected 19.5 to before 19.5.1Affected

References

https://gitlab.com/gitlab-org/gitlab/-/work_items/597022
HackerOne Bug Bounty Report #3657282technical-descriptionexploitpermissions-required
https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/

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