{"id":"CVE-2026-116168","title":"SiYuan before v3.8.7 Path Traversal Local File Read via MCP Asset Tool","summary":"SiYuan before 3.8.7 contains a path traversal vulnerability in the MCP asset tool because validateAssetUploadPaths relies on an incomplete sensitive-path blacklist that omits .env and other secret files. Authenticated attackers driving t…","severity":"medium","cvss":6.2,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cvssSource":"cna","cwe":["CWE-22"],"vendor":"siyuan-note","product":"siyuan","affected":["siyuan < 3.8.7"],"published":"2026-10-25","updated":"2026-10-25","sourceUpdated":"2026-10-25T14:27:41.242Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116168","references":[{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-q768-4j87-gf3w","label":"GitHub Security Advisory (GHSA-q768-4j87-gf3w)"},{"url":"https://www.vulncheck.com/advisories/siyuan-before-3.8.7-path-traversal-local-file-read-via-mcp-asset-tool","label":"VulnCheck Advisory: SiYuan before v3.8.7 Path Traversal Local File Read via MCP Asset Tool"}],"tags":["cve.org"],"ingestedAt":"2026-10-25T22:08:29.936Z","epss":0.00186,"epssPercentile":0.081,"slug":"CVE-2026-116168","body":"## Overview\n\nSiYuan before 3.8.7 contains a path traversal vulnerability in the MCP asset tool because validateAssetUploadPaths relies on an incomplete sensitive-path blacklist that omits .env and other secret files. Authenticated attackers driving the MCP asset upload action can copy such local files into the workspace and read them back via /assets/ over HTTP.\n\n## Affected\n\n- `siyuan < 3.8.7`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":34.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}