Key points
- Bytebase versions from 0.12.0 up to 1.0.1 contain a critical authentication bypass.
- Attackers can log in as any user, including the Owner, without valid credentials.
- The flaw allows creation of new members and full account impersonation via GitLab.
Bytebase versions 0.12.0 through any release prior to 1.0.1 contain a critical authentication bypass vulnerability. According to the National Vulnerability Database, this flaw allows unauthenticated attackers to log in as any user. The issue stems from how the application handles client-supplied GitLab provider configurations. Attackers can exploit this to impersonate existing users or create new accounts. No patch has been confirmed for versions older than 1.0.1 in the provided material.
In plain English
The vulnerability exists in the self-hosted GitLab login endpoint. The system trusts configuration data provided by the user's browser. An attacker can set a custom instance URL pointing to a server they control. That malicious server returns fake user data with a chosen email address. Bytebase then issues a valid session token for that principal. This lets the attacker assume the identity of any existing user, including the Owner, or add new members to the system.
The background
The flaw is tracked as CVE-2022-51026 and rated with a CVSS score of 9.3, which is considered critical. The weakness is categorized under CWE-290, which relates to authentication bypass. The affected software is Bytebase, specifically version 0.12.0 and any subsequent versions before 1.0.1. The National Vulnerability Database records indicate the issue allows for full account takeover without prior authentication.
What changes now
Administrators must verify their Bytebase version immediately. If running any version before 1.0.1, the system is vulnerable to remote impersonation. The source material indicates that version 1.0.1 is the cutoff for affected releases. Users should check their current deployment status. If no update is available from the vendor for older versions, exposure remains high. Monitoring for unauthorized session creation is essential while assessing upgrade options.
Who needs to act first
Teams should prioritize systems exposed to the public internet for immediate review. Check whether external access to the application can be restricted temporarily. Verify that only trusted networks can reach the login endpoint. Roll out any available updates in a staging environment first to ensure stability. Back up configuration files before making changes. If upgrading is not possible, consider disabling the specific GitLab integration until a fix is confirmed.
Background: Account takeover
Prevent account takeover by enforcing multi-factor authentication, monitoring for impossible travel, and implementing device binding. These controls stop attackers who steal passwords through phishing or data leaks. Verify every login attempt against expected behavior to reduce unauthorized access risks immediately.
Read the full guide: Account Takeover Prevention Checklist for Secure Systems
What to do and how to stay safe: Bytebase
- Check your Bytebase version to see if it is older than 1.0.1.
- Restrict network access to the application to trusted IPs only.
- Monitor logs for unusual login attempts or new user creation.
- Contact the vendor to confirm if a patch exists for your version.
Step-by-step guide: Out-of-Band Patches: Meaning, Risks, and Deployment Reality
General security guidance from the Patch Herald newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
Which Bytebase versions are affected by this vulnerability?
Versions 0.12.0 and any release before 1.0.1 are affected.
Can an attacker become the administrator?
Yes, the flaw allows attackers to impersonate any user, including the Owner.
What is the severity score for CVE-2022-51026?
The CVSS score is 9.3, which is rated as critical.
