Vulnerability details
CVE-2026-104252
Vitess vttablet /twopcz reflected XSS
Official description
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.8Critical | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| vitessio | vitess | < 23.0.5 | CVEProject cvelistV5 (CNA) |
| vitessio | vitess | >= 24.0.0, < 24.0.2 | CVEProject cvelistV5 (CNA) |
References and advisories
9- https://github.com/vitessio/vitess/pull/20273 x_refsource_MISC
- https://github.com/vitessio/vitess/pull/20274 x_refsource_MISC
- https://github.com/vitessio/vitess/security/advisories/GHSA-v75v-6fpf-gvw8 x_refsource_CONFIRM
- https://github.com/vitessio/vitess/pull/20255 x_refsource_MISC
- https://github.com/vitessio/vitess/commit/3140c1846cd120db34f33b2083139b4ab638aed2 x_refsource_MISC
- https://github.com/vitessio/vitess/commit/976e1e0d78f9d29d02e5e31b4aa7e180648f08af x_refsource_MISC
- https://github.com/vitessio/vitess/commit/c1ed96302e658190168c971afdac730cf70e43f7 x_refsource_MISC
- https://github.com/vitessio/vitess/releases/tag/v23.0.5 x_refsource_MISC
- https://github.com/vitessio/vitess/releases/tag/v24.0.2 x_refsource_MISC
Details
- Published
- 2026-10-13
- Last updated
- 2026-10-15
- State
- Published
- Assigner (CNA)
- GitHub_M
- Kolun priority
- 32 · Low
Exploit prediction (EPSS)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')