CVE-2026-116166

7.6 HIGH 0.1% exploit odds Fix listed Other OS & kernel

What it is

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.

At a glance

Exploitability: Can be exploited from the same network segment without logging in. High risk of data exposure, data tampering.
Exploit odds: 0.1% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-10-25 14:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-10-29 17:18 UTC Last updatedMost recent change to the record

Details

Published: 2026-10-25 14:16 UTC
Last modified: 2026-10-29 17:18 UTC
Exploit probability: 0.1% · EPSS, next 30 days
Weakness: CWE-319 · Cleartext transmission
Record status: Deferred

Attack profile CVSS 4.0 · 7.6

Attack vector: Adjacent network
Complexity: High
Attack requirements: Present
Privileges needed: None
User interaction: None
Confidentiality: High
Integrity: High
Availability: None

Raw vector

CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/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

Download Square Reddit

Fix and advisories

References

NVD record · CVE.org record