CVE-2026-104252

Summary

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.

Impact & exploitability

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

Affected products we track (1)

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://github.com/vitessio/vitess/commit/3140c1846cd120db34f33b2083139b4ab638aed2 ↗

Additional information

• NVD record
• https://github.com/vitessio/vitess/commit/3140c1846cd120db34f33b2083139b4ab638aed2Patch
• https://github.com/vitessio/vitess/commit/976e1e0d78f9d29d02e5e31b4aa7e180648f08afPatch
• https://github.com/vitessio/vitess/commit/c1ed96302e658190168c971afdac730cf70e43f7Patch
• https://github.com/vitessio/vitess/pull/20255Patch
• https://github.com/vitessio/vitess/pull/20273Patch
• https://github.com/vitessio/vitess/pull/20274Patch
• https://github.com/vitessio/vitess/releases/tag/v23.0.5
• https://github.com/vitessio/vitess/releases/tag/v24.0.2