{"id":"CVE-2026-82649","summary":"SiYuan before 3.8.1 Local Privilege Escalation via Uncontrolled Search Path","details":"SiYuan Windows installer before version 3.8.1 (affected versions \u003e= 2.0.14) contains an uncontrolled search path element vulnerability in its NSIS installer, which invokes system executables such as TASKKILL by name rather than by absolute path. Because NSIS nsExec::Exec resolves these calls using a search path that includes the installer's own launch directory ahead of System32, an attacker who plants a malicious executable (e.g., a renamed TASKKILL.exe) in that directory can have it executed when the installer runs. These calls occur in electron-builder's preInit hook before the license page is displayed, and with an all-users (elevated) install the planted binary executes with an elevated token, resulting in local privilege escalation.","aliases":["GHSA-9j65-967f-5rv3"],"modified":"2026-09-03T03:30:37.145182204Z","published":"2026-08-30T14:33:31.723Z","database_specific":{"cwe_ids":["CWE-427"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82649.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82649.json"},{"type":"ADVISORY","url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-9j65-967f-5rv3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-82649"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/siyuan-before-3.8.1-local-privilege-escalation-via-uncontrolled-search-path"},{"type":"FIX","url":"https://github.com/siyuan-note/siyuan/commit/251596fc0de2f9528c00c224252fd073a99973f4"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/siyuan-note/siyuan","events":[{"introduced":"87256b184d71660fa48f67990f2f5ce970c7ca9d"},{"fixed":"afa823b6b4e4f183511e0bc0a3be93caa94c7c97"}],"database_specific":{"extracted_events":[{"introduced":"2.0.14"},{"fixed":"3.8.1"}],"source":"AFFECTED_FIELD"}}],"versions":["v3.8.1-beta.6","v3.8.1-beta.5","v3.8.1-beta.4","v3.8.1-beta.1","v3.8.0","v3.8.0-beta.2","v3.8.0-alpha.4","v3.8.0-alpha.3","v3.8.0-alpha.2","v3.7.4-alpha.4","v3.7.4-alpha.2","v3.7.3","v3.7.3-beta.2","v3.7.3-beta.1","v3.7.0-rc.2","v3.7.0-rc.1","v3.6.5","v3.7.0-dev12","v3.7.0-dev8","v3.7.0-dev5","v3.7.0-dev2","v3.6.5-dev2","v3.6.4","v3.6.4-dev2","v3.6.3","v3.6.2","v3.6.1","v3.6.0","v3.5.10","v3.5.9","v3.5.8","v3.5.8-dev2","v3.5.7","v3.5.5","v3.5.4","v3.5.4-dev5","v3.5.4-dev3","v3.5.4-dev2","v3.5.4-dev1","v3.5.3","v3.5.3-dev5","v3.5.3-dev4","v3.5.3-dev3","v3.5.3-dev2","v3.5.2","v3.5.2-dev2","v3.5.2-dev1","v3.5.1","v3.5.1-dev2","v3.5.1-dev1","v3.5.0","v3.5.0-dev2","v3.5.0-dev1","v3.4.2","v3.4.2-dev1","v3.4.1","v3.4.1-dev1","v3.4.0","v3.4.0-dev5","v3.4.0-dev4","v3.4.0-dev3","v3.4.0-dev2","v3.4.0-dev1","v3.3.6","v3.3.6-dev2","v3.3.6-dev1","v3.3.5","v3.3.4","v3.3.4-dev2","v3.3.4-dev1","v3.3.3","v3.3.3-dev5","v3.3.3-dev4","v3.3.3-dev3","v3.3.3-dev2","v3.3.3-dev1","v3.3.2","v3.3.2-dev2","v3.3.2-dev1","v3.3.1","v3.3.0","v3.3.0-dev4","v3.3.0-dev3","v3.2.1","v3.2.1-dev6","v3.2.1-dev5","v3.2.1-dev4","v3.2.1-dev3","v3.2.1-dev2","v3.2.0-dev10","v3.2.0-dev9","v3.2.0-dev8","v3.2.0-dev6","v3.2.0-dev4","v3.2.0-dev3","v3.2.0-dev2","v3.2.0-dev1","v3.1.32","v3.1.32-dev2","v3.1.31","v3.1.30","v3.1.30-dev1","v3.1.29","v3.1.29-dev3","v3.1.28","v3.1.28-dev3","v3.1.28-dev2","v3.1.27","v3.1.27-dev4","v3.1.27-dev2","v3.1.27-dev1","v3.1.26","v3.1.26-dev3","v3.1.26-dev2","v3.1.26-dev1","v3.1.25","v3.1.25-dev6","v3.1.25-dev4","v3.1.25-dev3","v3.1.24","v3.1.23","v3.1.22","v3.1.22-dev2","v3.1.22-dev1","v3.1.21","v3.1.21-dev4","v3.1.21-dev3","v3.1.21-dev1","v3.1.20","v3.1.20-dev4","v3.1.20-dev3","v3.1.19","v3.1.19-dev3","v3.1.18","v3.1.17","v3.1.16","v3.1.15","v3.1.15-dev3","v3.1.15-dev1","v3.1.14","v3.1.14-dev2","v3.1.13","v3.1.12","v3.1.12-dev4","v3.1.12-dev3","v3.1.12-dev2","v3.1.11","v3.1.11-dev9","v3.1.11-dev5","v3.1.11-dev2","v3.1.10","v3.1.10-dev6","v3.1.10-dev1","v3.1.9","v3.1.9-dev10","v3.1.9-dev9","v3.1.9-dev7","v3.1.9-dev6","v3.1.9-dev4","v3.1.9-dev3","v3.1.9-dev2","v3.1.9-dev1","v3.1.8","v3.1.8-dev3","v3.1.8-dev2","v3.1.7","v3.1.7-dev8","v3.1.7-dev7","v3.1.7-dev5","v3.1.7-dev4","v3.1.7-dev3","v3.1.6","v3.1.6-dev2","v3.1.6-dev1","v3.1.5","v3.1.4","v3.1.4-dev5","v3.1.4-dev3","v3.1.4-dev2","v3.1.3","v3.1.3-dev2","v3.1.3-dev1","v3.1.2","v3.1.2-dev4","v3.1.2-dev3","v3.1.2-dev2","v3.1.1-dev2","v3.1.1-dev1","v3.1.0","v3.1.0-dev12","v3.1.0-dev11","v3.1.0-dev10","v3.1.0-dev9","v3.1.0-dev8","v3.1.0-dev3","v3.1.0-dev2","v3.0.17","v3.0.17-dev2","v3.0.17-dev1","v3.0.16","v3.0.16-dev3","v3.0.15","v3.0.15-dev2","v3.0.15-dev1","v3.0.14","v3.0.13-dev4","v3.0.13-dev3","v3.0.12","v3.0.12-dev5","v3.0.12-dev4","v3.0.12-dev1","v3.0.11","v3.0.10","v3.0.10-dev3","v3.0.10-dev1","v3.0.9","v3.0.8","v3.0.8-dev2","v3.0.8-dev1","v3.0.7","v3.0.7-dev1","v3.0.6","v3.0.6-dev3","v3.0.6-dev2","v3.0.5","v3.0.5-dev5","v3.0.5-dev4","v3.0.5-dev3","v3.0.4","v3.0.4-dev2","v3.0.3","v3.0.3-dev5","v3.0.3-dev4","v3.0.2","v3.0.2-dev2","v3.0.1","v3.0.1-dev2","v3.0.0","v3.0.0-dev2","v3.0.0-dev1","v2.12.8","v2.12.8-dev2","v2.12.7","v2.12.7-dev2","v2.12.7-dev1","v2.12.6","v2.12.5","v2.12.4","v2.12.4-dev2","v2.12.3","v2.12.3-dev2","v2.12.2","v2.12.1","v2.12.1-dev3","v2.12.0","v2.12.0-dev1","v2.11.4","v2.11.4-dev6","v2.11.4-dev5","v2.11.4-dev4","v2.11.4-dev2","v2.11.3","v2.11.3-dev2","v2.11.3-dev1","v2.11.2","v2.11.2-dev5","v2.11.2-dev4","v2.11.2-dev3","v2.11.2-dev2","v2.11.2-dev1","v2.11.1","v2.11.1-dev1","v2.11.0","v2.11.0-dev2","v2.10.16","v2.10.16-dev2","v2.10.15","v2.10.15-dev1","v2.10.14","v2.10.14-dev2","v2.10.14-dev1","v2.10.13","v2.10.13-dev5","v2.10.13-dev1","v2.10.12","v2.10.12-dev1","v2.10.11","v2.10.11-dev2","v2.10.10","v2.10.9","v2.10.9-dev3","v2.10.8","v2.10.8-dev3","v2.10.8-dev2","v2.10.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