vitessio Vitess up to 23.0.4/24.0.1 Debug Endpoint twopcz.go twopczHandler cross site scripting

Summaryinfo

A vulnerability labeled as problematic has been found in vitessio Vitess up to 23.0.4/24.0.1. This affects the function twopczHandler of the file go/vt/vttablet/tabletserver/twopcz.go of the component Debug Endpoint. Executing a manipulation can lead to cross site scripting. The identification of this vulnerability is CVE-2026-104252. The attack may be launched remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in vitessio Vitess up to 23.0.4/24.0.1. It has been declared as problematic. This vulnerability affects the function twopczHandler of the file go/vt/vttablet/tabletserver/twopcz.go of the component Debug Endpoint. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. CVE summarizes:

Vitess is a database clustering system for horizontal scaling of MySQL. Prior to 23.0.5 and 24.0.2, twopczHandler in go/vt/vttablet/tabletserver/twopcz.go writes the Action and dtid form values from the vttablet and vtcombo /twopcz HTTP debug endpoint into a text/html response without HTML escaping. Under the default allow-all ACL policy, a remote unauthenticated attacker can send an operator a crafted request that executes script in the operator's browser after the request is opened. The script runs with the vttablet debug origin and can read same-origin diagnostic endpoints that expose query, transaction, environment, variable, or profiling data available in that deployment. This issue is fixed in versions 23.0.5 and 24.0.2.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-104252 since 10/01/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 23.0.5 or 24.0.2 eliminates this vulnerability.

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Productinfo

Vendor

• vitessio

Name

• Vitess

Version

• 23.0.0
• 23.0.1
• 23.0.2
• 23.0.3
• 23.0.4
• 24.0.0
• 24.0.1

Website

• Product: https://github.com/vitessio/vitess/

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