---
id: CVE-2022-51026
title: >-
  Bytebase 0.12.0 before 1.0.1 Authentication Bypass via GitLab Self-Hosted
  Login
summary: >-
  Bytebase 0.12.0 before 1.0.1 contains an authentication bypass vulnerability
  that allows unauthenticated attackers to log in as any user. The flaw stems
  from trusting client-supplied GitLab provider configuration in the POST
  /api/auth/lo…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-290
vendor: bytebase
product: bytebase
affected:
  - bytebase >= 0.12.0 < 1.0.1
published: '2026-10-22'
updated: '2026-10-22'
sourceUpdated: '2026-10-22T19:13:18.259Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2022-51026'
references:
  - url: >-
      https://github.com/bytebase/bytebase/security/advisories/GHSA-5r3p-6rj5-7937
    label: GitHub Security Advisory (GHSA-5r3p-6rj5-7937)
  - url: >-
      https://github.com/bytebase/bytebase/commit/d69e682243b25b51dd52912a26e2f259b5f3db2d
  - url: 'https://github.com/bytebase/bytebase/pull/834'
  - url: 'https://github.com/bytebase/bytebase/blob/1.0.0/server/auth.go#L79-L93'
  - url: 'https://github.com/bytebase/bytebase/releases/tag/1.0.1'
    label: bytebase 1.0.1 Release Notes
  - url: 'https://github.com/bytebase/bytebase'
  - url: >-
      https://www.vulncheck.com/advisories/bytebase-0.12.0-before-1.0.1-authentication-bypass-via-gitlab-self-hosted-login
    label: >-
      VulnCheck Advisory: Bytebase 0.12.0 before 1.0.1 Authentication Bypass via
      GitLab Self-Hosted Login
tags:
  - cve.org
ingestedAt: '2026-10-22T22:00:50.394Z'
---

## Overview

Bytebase 0.12.0 before 1.0.1 contains an authentication bypass vulnerability that allows unauthenticated attackers to log in as any user. The flaw stems from trusting client-supplied GitLab provider configuration in the POST /api/auth/login/GITLAB_SELF_HOST endpoint. Attackers can set instanceUrl to a server they control that returns an active user with a chosen email. Bytebase then issues session tokens for that principal, letting attackers impersonate existing users including the Owner or create new members.

## Affected

- `bytebase >= 0.12.0 < 1.0.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.