What is CVE-2026-85584?

CVE-2026-85584 is a high-severity vulnerability, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-09-04.

How severe is CVE-2026-85584?

High severity. CVSS v3 base score is 7.5 out of 10.

CVE-2026-85584

CVE-2026-85584

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.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

disclosure@vulncheck.com
disclosure@vulncheck.com

Frequently asked questions

What is CVE-2026-85584?: CVE-2026-85584 is a high-severity vulnerability, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-09-04.
How severe is CVE-2026-85584?: High severity. CVSS v3 base score is 7.5 out of 10.