CVE-2026-82654

HighCVSS 8.9/10Last modified Sep 1, 2026

Description

SiYuan before v3.8.1 fails to properly escape block name, alias, and memo fields in hint, backlink, and breadcrumb rendering functions. Attackers can set a block's name to contain HTML/script tags that execute when another user views documents referencing or displaying that block.

Metrics

CVSS 3.1 8.9/10CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L

Weakness enumeration

CWE-79

Affected software

No affected versions have been published.

Timeline

Published: Aug 30, 2026
Last modified: Sep 1, 2026
NVD status: Deferred

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