{"id":"EUVD-2026-39123","revision":"8a53bd83c84e4ed7bc02aa3a9fc96945","records":[{"revision":"8a53bd83c84e4ed7bc02aa3a9fc96945","observedAt":"2026-11-05T11:40:22.926+00:00","statement":{"source":"euvd","id":"EUVD-2026-39123","aliases":["CVE-2026-54067","GHSA-mvjr-vv3c-w4qv"],"title":"SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, CSS snippet body containing </style> breaks out of its surrounding <style> tag when renderSnippet() interpolates it via insertAdjacentHTML. A payload like runs a…","description":"SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, CSS snippet body containing </style> breaks out of its surrounding <style> tag when renderSnippet() interpolates it via insertAdjacentHTML. A payload like runs arbitrary JavaScript in the renderer. On Electron desktop builds the renderer runs with nodeIntegration:true, so require('child_process') is reachable from the injected handler and the XSS chains to host RCE. Snippets sync via the workspace repository, so an attacker with write access to any synced workspace plants the payload once and it fires on every device that pulls. The bug also bypasses the user's enabledCSS / enabledJS separation. A user who turned enabledJS off was making a deliberate call not to run untrusted JavaScript; the CSS path runs it anyway. This vulnerability is fixed in 3.7.0.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","score":9.9,"severity":null}],"references":["https://github.com/siyuan-note/siyuan/security/advisories/GHSA-mvjr-vv3c-w4qv"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-39123","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jun 24, 2026, 9:14:38 PM","dateUpdated":"Jun 25, 2026, 3:29:48 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-39123","identifiers":["EUVD-2026-39123","CVE-2026-54067","GHSA-mvjr-vv3c-w4qv"]},"retained":false,"historicalAffected":[]}],"coverage":[]}