{"id":"CVE-2026-87815","aliases":["EUVD-2026-74841","GHSA-94vh-rpgr-rpwc","GHSA-h9g5-83g6-g5ch"],"status":"published","title":"SiYuan before v3.8.2 Path Traversal via removeRiffDeck","description":"SiYuan versions before v3.8.2 contain a path traversal vulnerability in the /api/riff/removeRiffDeck endpoint that fails to validate the deckID parameter. An authenticated administrator can supply path traversal sequences to delete arbitrary .deck and .cards files outside the workspace directory.","severity":{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00479,"percentile":0.41885,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-73"],"published":"2026-09-09T11:21:02Z","modified":"2026-10-28T02:30:27Z","products":[{"vendor":"siyuan-note","product":"siyuan"}],"references":[{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-94vh-rpgr-rpwc","tags":["vendor-advisory","exploit","advisory"]},{"url":"https://www.vulncheck.com/advisories/siyuan-before-3.8.2-path-traversal-via-removeriffdeck","tags":["third-party-advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-87815","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-h9g5-83g6-g5ch"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/87xxx/CVE-2026-87815.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-87815","title":"SiYuan before v3.8.2 Path Traversal via removeRiffDeck","description":"SiYuan versions before v3.8.2 contain a path traversal vulnerability in the /api/riff/removeRiffDeck endpoint that fails to validate the deckID parameter. An authenticated administrator can supply path traversal sequences to delete arbitrary .deck and .cards files outside the workspace directory.","status":"published","published":"2026-09-09T11:21:02.63Z","modified":"2026-09-14T13:08:07.201Z","cvss":[{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H","level":"high","assessor":"cna"},{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-73"],"updated_at":"2026-11-02T13:37:47.463822Z"}],"euvd":[{"id":"EUVD-2026-74841","description":"SiYuan versions before v3.8.2 contain a path traversal vulnerability in the /api/riff/removeRiffDeck endpoint that fails to validate the deckID parameter. An authenticated administrator can supply path traversal sequences to delete arbitrary .deck and .cards files outside the workspace directory.","status":"published","published":"2026-09-09T11:21:02Z","modified":"2026-09-14T13:08:07Z","cvss":[{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H","level":"high"}],"updated_at":"2026-11-02T17:28:20.757989Z"}],"ghsa":[{"id":"GHSA-h9g5-83g6-g5ch","title":"SiYuan versions before v3.8.2 contain a path traversal vulnerability in the /api/riff...","description":"SiYuan versions before v3.8.2 contain a path traversal vulnerability in the /api/riff/removeRiffDeck endpoint that fails to validate the deckID parameter. An authenticated administrator can supply path traversal sequences to delete arbitrary .deck and .cards files outside the workspace directory.","status":"published","published":"2026-09-09T12:32:15Z","modified":"2026-09-09T12:32:15Z","cvss":[{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"},{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H","level":"high"}],"cwes":["CWE-73"],"updated_at":"2026-11-02T15:11:38.096751Z"}],"nvd":[{"id":"CVE-2026-87815","description":"SiYuan versions before v3.8.2 contain a path traversal vulnerability in the /api/riff/removeRiffDeck endpoint that fails to validate the deckID parameter. An authenticated administrator can supply path traversal sequences to delete arbitrary .deck and .cards files outside the workspace directory.","status":"published","published":"2026-09-09T12:17:16.537Z","modified":"2026-09-14T14:17:17.65Z","cvss":[{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-73"],"updated_at":"2026-11-02T14:12:45.93749Z"}],"osv":[{"id":"CVE-2026-87815","title":"SiYuan before v3.8.2 Path Traversal via removeRiffDeck","description":"SiYuan versions before v3.8.2 contain a path traversal vulnerability in the /api/riff/removeRiffDeck endpoint that fails to validate the deckID parameter. An authenticated administrator can supply path traversal sequences to delete arbitrary .deck and .cards files outside the workspace directory.","status":"published","published":"2026-09-09T11:21:02.63Z","modified":"2026-10-28T02:30:27.312475464Z","cvss":[{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H","level":"high"}],"cwes":["CWE-73"],"updated_at":"2026-11-02T15:45:19.210277Z"}]}}