{"id":"CVE-2026-104252","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-104252","generatedAt":"2026-10-28T02:21:46.981Z","title":"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.","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.","published":"2026-10-13T20:17:12.000Z","lastModified":"2026-10-23T15:14:48.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-79"],"affected":["linuxfoundation/vitess"],"epss":{"score":0.01174,"percentile":0.67297,"date":"2026-10-26","history":[{"date":"2026-10-14","score":0.00885,"percentile":0.58377}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (1.17%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-13T20:17:12.000Z","detail":{"score":"9.8","severity":"CRITICAL","publishedAt":"2026-10-13T20:17:12.453Z"},"summary":"New CVE, critical severity (CVSS 9.8)."}],"references":[{"url":"https://github.com/vitessio/vitess/commit/3140c1846cd120db34f33b2083139b4ab638aed2","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/vitessio/vitess/commit/976e1e0d78f9d29d02e5e31b4aa7e180648f08af","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/vitessio/vitess/commit/c1ed96302e658190168c971afdac730cf70e43f7","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/vitessio/vitess/pull/20255","tags":["Issue Tracking","Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/vitessio/vitess/pull/20273","tags":["Issue Tracking","Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/vitessio/vitess/pull/20274","tags":["Issue Tracking","Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/vitessio/vitess/releases/tag/v23.0.5","tags":["Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/vitessio/vitess/releases/tag/v24.0.2","tags":["Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/vitessio/vitess/security/advisories/GHSA-v75v-6fpf-gvw8","tags":["Vendor Advisory","Exploit","Mitigation"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-104252","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}