CVE-2026-104252Vitess vttablet /twopcz reflected XSS
- 9.8CriticalCVSS base score
- 1.2%Exploitation in 30 daysEPSS · top 32% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By GitHub_M
- 12 days later
· 12 days later
Published
- 2 days later
· 2 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 1.2% · top 32% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Govitess.io/vitessGHSA-v75v-6fpf-gvw8 (opens in a new tab)
References
References9
- https://github.com/vitessio/vitess/security/advisories/GHSA-v75v-6fpf-gvw8 (opens in a new tab)x_refsource_CONFIRM
- https://github.com/vitessio/vitess/pull/20255 (opens in a new tab)x_refsource_MISC
- https://github.com/vitessio/vitess/pull/20273 (opens in a new tab)x_refsource_MISC
- https://github.com/vitessio/vitess/pull/20274 (opens in a new tab)x_refsource_MISC
- https://github.com/vitessio/vitess/commit/3140c1846cd120db34f33b2083139b4ab638aed2 (opens in a new tab)x_refsource_MISC
- https://github.com/vitessio/vitess/commit/976e1e0d78f9d29d02e5e31b4aa7e180648f08af (opens in a new tab)x_refsource_MISC
- https://github.com/vitessio/vitess/commit/c1ed96302e658190168c971afdac730cf70e43f7 (opens in a new tab)x_refsource_MISC
- https://github.com/vitessio/vitess/releases/tag/v23.0.5 (opens in a new tab)x_refsource_MISC
- https://github.com/vitessio/vitess/releases/tag/v24.0.2 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-100525 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-v75v-6fpf-gvw8 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-104252)Record last updated .