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OpenAdvisories
High · 7.5 CVE-2026-85581 EUVD-2026-71004GHSA-4qv4-f447-c9m2

SiYuan before v3.8.2 Denial of Service via unauthenticated UI-process registration

Published Sep 4, 2026 · Updated Sep 10, 2026 · Assigned by VulnCheck

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.

Affected products

VendorProductAffectedFixed
siyuan-note siyuan < 3.8.2 3.8.2

References