What’s Vulnerable › Vulnerabilities

CVE-2022-51026: Bytebase 0.12.0 before 1.0.1 Authentication Bypass via GitLab Self-Hosted Login

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-22 · updated 2026-10-29
• Weakness: CWE-290

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 products

• bytebase: from 0.12.0 before 1.0.1 — fixed in 1.0.1

How to fix

Upgrade to a fixed version: bytebase 1.0.1. Check the vendor advisory for mitigations.

References

• https://github.com/bytebase/bytebase
• https://github.com/bytebase/bytebase/blob/1.0.0/server/auth.go#L79-L93
• https://github.com/bytebase/bytebase/commit/d69e682243b25b51dd52912a26e2f259b5f3db2d
• https://github.com/bytebase/bytebase/pull/834
• https://github.com/bytebase/bytebase/releases/tag/1.0.1
• https://github.com/bytebase/bytebase/security/advisories/GHSA-5r3p-6rj5-7937
• https://www.vulncheck.com/advisories/bytebase-0.12.0-before-1.0.1-authentication-bypass-via-gitlab-self-hosted-login

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