CVE-2026-85582

Medium

Description

SiYuan versions before v3.8.2 contain an unbounded session creation vulnerability in the publish-service Basic Auth handler that allows authenticated attackers to exhaust memory. Attackers can repeatedly authenticate with valid credentials to create persistent session entries without expiry or capacity limits, causing indefinite process memory growth and denial of service.

SeverityMedium

CVSS6.5

Exploit probability—

ProductSiyuan

PublishedSep 4, 2026

First seenSep 4, 2026

Weakness typeCWE-770Allocation of resources without limits

How to fix

Update

siyuan-note siyuan3.8.2 or later

Vendor advisories

github.com/siyuan-note/siyuan/security/advisories/GHSA-f4vj-ppp2-5hg4

Affected products

Product	Affected versions	Fixed in
siyuan-note siyuan	v < 3.8.2	3.8.2

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