CVE-2026-87815

High

Description

SiYuan versions before v3.8.2 contain a path traversal vulnerability in the /api/riff/removeRiffDeck endpoint that fails to validate the deckID parameter. An authenticated administrator can supply path traversal sequences to delete arbitrary .deck and .cards files outside the workspace directory.

SeverityHigh

CVSS8.7

Exploit probability—

ProductSiyuan

PublishedSep 9, 2026

First seenSep 9, 2026

Weakness typeCWE-73CWE-73

How to fix

Update

siyuan-note siyuan3.8.2 or later

Vendor advisories

github.com/siyuan-note/siyuan/security/advisories/GHSA-94vh-rpgr-rpwc

Affected products

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

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