CVE-2026-104252
Vitess vttablet /twopcz reflected XSS
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.
INFO
Published Date :
Oct. 13, 2026, 8:17 p.m.
Last Modified :
Oct. 23, 2026, 3:14 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | MITRE-CVE | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update Vitess to version 23.0.5 or later.
- Update Vitess to version 24.0.2 or later.
- Apply available security patches from the vendor.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-104252.
| URL | Resource |
|---|---|
| https://github.com/vitessio/vitess/commit/3140c1846cd120db34f33b2083139b4ab638aed2 | Patch |
| https://github.com/vitessio/vitess/commit/976e1e0d78f9d29d02e5e31b4aa7e180648f08af | Patch |
| https://github.com/vitessio/vitess/commit/c1ed96302e658190168c971afdac730cf70e43f7 | Patch |
| https://github.com/vitessio/vitess/pull/20255 | Issue Tracking Patch |
| https://github.com/vitessio/vitess/pull/20273 | Issue Tracking Patch |
| https://github.com/vitessio/vitess/pull/20274 | Issue Tracking Patch |
| https://github.com/vitessio/vitess/releases/tag/v23.0.5 | Release Notes |
| https://github.com/vitessio/vitess/releases/tag/v24.0.2 | Release Notes |
| https://github.com/vitessio/vitess/security/advisories/GHSA-v75v-6fpf-gvw8 | Vendor Advisory Exploit Mitigation |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-104252 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-104252
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-104252 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-104252 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Oct. 23, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:linuxfoundation:vitess:*:*:*:*:*:*:*:* versions up to (excluding) 23.0.5 *cpe:2.3:a:linuxfoundation:vitess:*:*:*:*:*:*:*:* versions from (including) 24.0.0 up to (excluding) 24.0.2 Added Reference Type GitHub, Inc.: https://github.com/vitessio/vitess/commit/3140c1846cd120db34f33b2083139b4ab638aed2 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/vitessio/vitess/commit/976e1e0d78f9d29d02e5e31b4aa7e180648f08af Types: Patch Added Reference Type GitHub, Inc.: https://github.com/vitessio/vitess/commit/c1ed96302e658190168c971afdac730cf70e43f7 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/vitessio/vitess/pull/20255 Types: Issue Tracking, Patch Added Reference Type GitHub, Inc.: https://github.com/vitessio/vitess/pull/20273 Types: Issue Tracking, Patch Added Reference Type GitHub, Inc.: https://github.com/vitessio/vitess/pull/20274 Types: Issue Tracking, Patch Added Reference Type GitHub, Inc.: https://github.com/vitessio/vitess/releases/tag/v23.0.5 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/vitessio/vitess/releases/tag/v24.0.2 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/vitessio/vitess/security/advisories/GHSA-v75v-6fpf-gvw8 Types: Exploit, Mitigation, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Oct. 15, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-104252', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-15T13:23:55.916133Z'} -
New CVE Received by [email protected]
Oct. 13, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-79 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/104xxx/CVE-2026-104252.json">CVE-2026-104252</a> Added Reference https://github.com/vitessio/vitess/commit/3140c1846cd120db34f33b2083139b4ab638aed2 Added Reference https://github.com/vitessio/vitess/commit/976e1e0d78f9d29d02e5e31b4aa7e180648f08af Added Reference https://github.com/vitessio/vitess/commit/c1ed96302e658190168c971afdac730cf70e43f7 Added Reference https://github.com/vitessio/vitess/pull/20255 Added Reference https://github.com/vitessio/vitess/pull/20273 Added Reference https://github.com/vitessio/vitess/pull/20274 Added Reference https://github.com/vitessio/vitess/releases/tag/v23.0.5 Added Reference https://github.com/vitessio/vitess/releases/tag/v24.0.2 Added Reference https://github.com/vitessio/vitess/security/advisories/GHSA-v75v-6fpf-gvw8