CVE-2026-85581

HighCVSS 7.5/10Last modified Sep 10, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-770

Affected software

Vendor	Product	Versions
siyuan-note	siyuan	< 3.8.2

References

Timeline

Published: Sep 4, 2026
Last modified: Sep 10, 2026
NVD status: Deferred

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