{"id":"CVE-2026-87815","title":"SiYuan versions before v3.8.2 contain a path traversal vulnerability in the /api/riff/removeRiffDeck endpoint that fails to validate the deckID parameter","summary":"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 arbit…","severity":"high","cvss":8.7,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H","cwe":["CWE-73"],"vendor":"siyuan-note","product":"siyuan","affected":["siyuan < 3.8.2"],"published":"2026-09-09","updated":"2026-09-14","sourceUpdated":"2026-09-14T14:17:17.650","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-87815","references":[{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-94vh-rpgr-rpwc","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/siyuan-before-3.8.2-path-traversal-via-removeriffdeck","label":"disclosure@vulncheck.com"},{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-94vh-rpgr-rpwc","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-14T13:07:42.724144Z"},"epss":0.00266,"epssPercentile":0.19033,"ingestedAt":"2026-09-14T15:23:07.418Z","slug":"CVE-2026-87815","body":"## Overview\n\nSiYuan 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":60,"depthScoreParts":{"impact":47.8,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":200120,"id":"CVE-2026-87815","ts":1789395647178,"field":"exploit_available","old":"false","new":"true"}]}