{"id":"CVE-2026-116167","title":"SiYuan 2.9.0 before 3.8.7 XSS via check-auth to Parameter","summary":"SiYuan from 2.9.0 before 3.8.7 contains a cross-site scripting vulnerability in the unauthenticated /check-auth page that assigns the to parameter to window.location.href without scheme validation. Attackers can send a crafted link with …","severity":"medium","cvss":6.8,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N","cvssSource":"cna","cwe":["CWE-79"],"vendor":"siyuan-note","product":"siyuan","affected":["siyuan >= 2.9.0 < 3.8.7"],"published":"2026-10-25","updated":"2026-10-25","sourceUpdated":"2026-10-25T13:20:10.372Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116167","references":[{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-fmj3-xc2f-6w4w","label":"GitHub Security Advisory (GHSA-fmj3-xc2f-6w4w)"},{"url":"https://www.vulncheck.com/advisories/siyuan-2.9.0-before-3.8.7-xss-via-check-auth-to-parameter","label":"VulnCheck Advisory: SiYuan 2.9.0 before 3.8.7 XSS via check-auth to Parameter"}],"tags":["cve.org"],"ingestedAt":"2026-10-25T22:08:29.948Z","slug":"CVE-2026-116167","body":"## Overview\n\nSiYuan from 2.9.0 before 3.8.7 contains a cross-site scripting vulnerability in the unauthenticated /check-auth page that assigns the to parameter to window.location.href without scheme validation. Attackers can send a crafted link with a javascript: URI that executes after victim login, invoking kernel APIs to read or modify workspace content and settings.\n\n## Affected\n\n- `siyuan >= 2.9.0 < 3.8.7`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":37,"depthScoreParts":{"impact":37.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}