CVE-2026-85585

High

Description

SiYuan before v3.8.2 contains an unbounded resource consumption vulnerability in the request-concurrency middleware that retains mutex entries for every unique request path without eviction. Unauthenticated attackers can send numerous unique request paths to permanently increase process memory and synchronization overhead, degrading availability.

SeverityHigh

CVSS7.5

Exploit probability—

ProductSiyuan

PublishedSep 4, 2026

First seenSep 4, 2026

Weakness typeCWE-400Uncontrolled resource consumption

How to fix

Update

siyuan-note siyuan3.8.2 or later

Vendor advisories

github.com/siyuan-note/siyuan/security/advisories/GHSA-p59v-3q54-qq55

Affected products

Product	Affected versions	Fixed in
siyuan-note siyuan	v < 3.8.2	3.8.2

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