{"id":"CVE-2026-92986","title":"SiYuan before 3.8.4 renders document titles as HTML in the backlink dock tree without escaping markup characters","summary":"SiYuan before 3.8.4 renders document titles as HTML in the backlink dock tree without escaping markup characters. Attackers can set malicious titles through the rename API or crafted notebooks to execute scripts in the Electron renderer …","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-79"],"vendor":"siyuan-note","product":"siyuan","affected":["siyuan < 3.8.4"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T20:18:59.970","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-92986","references":[{"url":"https://github.com/siyuan-note/siyuan","label":"disclosure@vulncheck.com"},{"url":"https://github.com/siyuan-note/siyuan/blob/v3.8.3/app/src/util/Tree.ts#L134","label":"disclosure@vulncheck.com"},{"url":"https://github.com/siyuan-note/siyuan/commit/6f093ebe50afc503e2a8b056164293054f8509e7","label":"disclosure@vulncheck.com"},{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-c5h9-g2c6-fxjw","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/siyuan-before-3.8.4-cross-site-scripting-via-document-title","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-09-17T19:18:16.493942Z"},"ingestedAt":"2026-09-17T15:20:39.003Z","epss":0.00412,"epssPercentile":0.35082,"slug":"CVE-2026-92986","body":"## Overview\n\nSiYuan before 3.8.4 renders document titles as HTML in the backlink dock tree without escaping markup characters. Attackers can set malicious titles through the rename API or crafted notebooks to execute scripts in the Electron renderer with access to child_process for command execution.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}