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CVE-2026-54158 is a stored cross-site scripting vulnerability in SiYuan, an open-source personal knowledge management system, affecting versions prior to 3.7.0. The flaw is in the attribute-view database cell renderer function genAVValueHTML(), which interpolates untrusted cell content without proper escaping in at least four rendering branches: text, url, phone, and mAsset. Crafted cell values can break out of surrounding HTML context and execute arbitrary JavaScript when a user opens the block-attribute panel containing the malicious row. The malicious content is also not escaped on input, allowing the payload to persist unchanged in attribute-view data and propagate through normal workspace synchronization. In Electron desktop builds, the renderer executes with nodeIntegration enabled, allowing the XSS condition to be chained into host-level remote code execution through Node.js APIs.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.