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CVE-2026-116166 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

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 flow and session cookie, which lacks the Secure attribute while responses omit HSTS, to hijack kernel API sessions.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:4.8 MEDIUMVector:CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

CNA: [email protected]CVSS-B:6.8 MEDIUMVector:CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hpj5-f7cj-vvwr	CISA-ADP	AdvisoryExploitTechnical AnalysisVendor
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hpj5-f7cj-vvwr	[email protected]	AdvisoryExploitTechnical AnalysisVendor
https://www.vulncheck.com/advisories/siyuan-3.6.0-before-3.8.7-cleartext-transmission-via-unenforced-networkservetls-setting	[email protected]	AdvisoryVendor

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-319	Cleartext Transmission of Sensitive Information	[email protected]

Affected Products

Product	Versions
SiYuan	>= 3.6.0, <= 3.8.6 (semver)
CPE cpe:2.3:a:b3log:siyuan:::::::: Remediation Upgrade: v3.8.7moderate effort

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 29, 2026	CVE Modified	CISA-ADP
Oct 25, 2026	New CVE Received	[email protected]