---
id: CVE-2026-105777
title: Insertion of Sensitive Information Into Sent Data in GitLab
summary: >-
  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 s…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-201
vendor: GitLab
product: GitLab
affected:
  - GitLab >= 17.6.5 < 19.3.6
  - GitLab >= 19.4 < 19.4.3
  - GitLab >= 19.5 < 19.5.1
published: '2026-10-21'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T23:34:25.440Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-105777'
references:
  - url: 'https://gitlab.com/gitlab-org/gitlab/-/work_items/597022'
  - url: 'https://hackerone.com/reports/3657282'
    label: 'HackerOne Bug Bounty Report #3657282'
  - url: >-
      https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/
tags:
  - cve.org
ingestedAt: '2026-10-22T00:21:21.865Z'
---

## Overview

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.

## Affected

- `GitLab >= 17.6.5 < 19.3.6`
- `GitLab >= 19.4 < 19.4.3`
- `GitLab >= 19.5 < 19.5.1`

## Remediation

Upgrade to versions 19.3.6, 19.4.3, 19.5.1 or above.