{"id":"CVE-2026-116166","title":"SiYuan 3.6.0 before 3.8.7 Cleartext Transmission via Unenforced networkServeTLS Setting","summary":"SiYuan 3.6.0 before 3.8.7 accepts and persists the networkServeTLS setting but never enforces it, so the kernel port keeps serving full API access over plain HTTP alongside HTTPS. Network-adjacent attackers can sniff the cleartext login …","severity":"medium","cvss":6.8,"cvssVector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","cvssSource":"cna","cwe":["CWE-319"],"vendor":"siyuan-note","product":"siyuan","affected":["siyuan >= 3.6.0 < 3.8.7"],"published":"2026-10-25","updated":"2026-10-25","sourceUpdated":"2026-10-25T13:20:09.700Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116166","references":[{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hpj5-f7cj-vvwr","label":"GitHub Security Advisory (GHSA-hpj5-f7cj-vvwr)"},{"url":"https://www.vulncheck.com/advisories/siyuan-3.6.0-before-3.8.7-cleartext-transmission-via-unenforced-networkservetls-setting","label":"VulnCheck Advisory: SiYuan 3.6.0 before 3.8.7 Cleartext Transmission via Unenforced networkServeTLS Setting"}],"tags":["cve.org"],"ingestedAt":"2026-10-25T22:08:29.948Z","slug":"CVE-2026-116166","body":"## Overview\n\nSiYuan 3.6.0 before 3.8.7 accepts and persists the networkServeTLS setting but never enforces it, so the kernel port keeps serving full API access over plain HTTP alongside HTTPS. Network-adjacent attackers can sniff the cleartext login flow and session cookie, which lacks the Secure attribute while responses omit HSTS, to hijack kernel API sessions.\n\n## Affected\n\n- `siyuan >= 3.6.0 < 3.8.7`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":37,"depthScoreParts":{"impact":37.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}