CVE-2026-85584CWE-770denial-of-service

CVE-2026-85584

High · published September 4, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
47.7
In the wild
Unconfirmed
What it is

SiYuan versions before v3.8.2 contain a denial of service vulnerability in the publish-service Basic Auth throttle that stores failed-attempt state using attacker-controlled usernames without enforcing capacity limits or eviction policies. Unauthenticated attackers can submit repeated authentication requests with unique invalid usernames to exhaust memory and increase synchronization overhead, degrading service 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
0.00593 · 47.7th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-09-04T16:17Z
References (3)
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-2x7j-p79w-7744 · [email protected]https://www.vulncheck.com/advisories/siyuan-before-3.8.2-denial-of-service-via-auth-throttle · [email protected]https://github.com/siyuan-note/siyuan/security/advisories/GHSA-2x7j-p79w-7744 · 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 Denial of Service via Auth Throttle
    cvelistv5