Vulnerability · Published Oct 22, 2026 · Assigned by VulnCheck
CVE-2022-51026Bytebase 0.12.0 before 1.0.1 Authentication Bypass via GitLab Self-Hosted Login
Critical 9.8
In plain English
A critical-severity authentication bypass by spoofing in bytebase from bytebase. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/bytebase/bytebase | 1.0.1 | GHSA-5r3p-6rj5-7937 |
Affected products (as reported)
Weakness: CWE-290 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- GitHub Security Advisory (GHSA-5r3p-6rj5-7937) vendor-advisory
- https://github.com/bytebase/bytebase/commit/d69e682243b25b51dd52912a26e2f259b5f3db2d patch
- https://github.com/bytebase/bytebase/pull/834 patch, issue-tracking
- https://github.com/bytebase/bytebase/blob/1.0.0/server/auth.go#L79-L93 technical-description
- bytebase 1.0.1 Release Notes release-notes
- https://github.com/bytebase/bytebase product
- VulnCheck Advisory: Bytebase 0.12.0 before 1.0.1 Authentication Bypass via GitLab Self-Hosted Login third-party-advisory