What is GHSA-4qv4-f447-c9m2?

GHSA-4qv4-f447-c9m2 is a security advisory published by GitHub Security Advisories with High severity. SiYuan before v3.8.2 contains a denial of service vulnerability in the unauthenticated /api...

Which CVE IDs does GHSA-4qv4-f447-c9m2 cover?

GHSA-4qv4-f447-c9m2 covers the following CVE IDs: CVE-2026-85581. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-4qv4-f447-c9m2?

GHSA-4qv4-f447-c9m2 has a CVSS v3 base score of 7.5, published by GitHub Security Advisories.

GHSA-4qv4-f447-c9m2HighCVSS 7.5

SiYuan before v3.8.2 contains a denial of service vulnerability in the unauthenticated /api...

Vendor

GitHub Security Advisories

Published

September 4, 2026

Last Modified

September 4, 2026

🔗 CVE IDs covered (1)

CVE-2026-85581 →

📋 Description

SiYuan before v3.8.2 contains a denial of service vulnerability in the unauthenticated /api/system/uiproc endpoint that accepts and retains attacker-controlled process identifiers without size limits or authentication. Attackers can send repeated requests with unique identifiers to exhaust process memory and degrade service availability.

🔗 References (4)

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-wv96-wmf5-xvj2
https://nvd.nist.gov/vuln/detail/CVE-2026-85581
https://www.vulncheck.com/advisories/siyuan-before-3.8.2-denial-of-service-via-unauthenticated-ui-process-registration
https://github.com/advisories/GHSA-4qv4-f447-c9m2