CVE-2026-85585CWE-400denial-of-service

CVE-2026-85585

High · published September 4, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
42.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00509 · 42.6th percentile
Weakness
CWE-400 · Uncontrolled Resource Consumption
Published
2026-09-04T16:17Z
References (3)
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-p59v-3q54-qq55 · [email protected]https://www.vulncheck.com/advisories/siyuan-before-3.8.2-unbounded-memory-consumption-via-controlconcurrency · [email protected]https://github.com/siyuan-note/siyuan/security/advisories/GHSA-p59v-3q54-qq55 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 06 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 04 SEP 11:29Z
    SiYuan before v3.8.2 Unbounded Memory Consumption via ControlConcurrency
    cvelistv5