Vulnerability in Bytebase
CVE-2022-51026
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.
Published .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/bytebase/bytebase (product)
- github.com/bytebase/bytebase/blob/1.0.0/server/auth.go (technical-description)
- github.com/bytebase/bytebase/commit/d69e682243b25b51dd52912a26e2f259b5f3db2d (patch)
- github.com/bytebase/bytebase/pull/834 (issue-tracking, patch)
- github.com/bytebase/bytebase/releases/tag/1.0.1 (release-notes)
- github.com/bytebase/bytebase/security/advisories/GHSA-5r3p-6rj5-7937 (vendor-advisory)
- www.vulncheck.com/advisories/bytebase-0.12.0-before-1.0.1-authentication-bypass… (third-party-advisory)
Frequently asked questions
- What is CVE-2022-51026?
- CVE-2022-51026 is a critical-severity vulnerability in Bytebase, classified under Authentication Bypass by Spoofing. CVSS score: 9.8/10. Published 2026-10-22.
- How severe is CVE-2022-51026?
- Critical severity. CVSS v3 base score is 9.8 out of 10.