CVE-2022-51026

Bytebase 0.12.0 before 1.0.1 Authentication Bypass via GitLab Self-Hosted Login

Assigner: VulnCheck
Reserved: 22.10.2026 Published: 22.10.2026 Updated: 22.10.2026

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.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 9.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	bytebase
Product	bytebase
Versions	Default: unaffected affected from 0.12.0 to 1.0.1 (excl.) Version 1.0.1 is unaffected

Vendor

bytebase

Product

bytebase

Versions

Default: unaffected

affected from 0.12.0 to 1.0.1 (excl.)
Version 1.0.1 is unaffected

Credits

leediay153 from Viettel Post reporter

References

Problem Types