What’s Vulnerable › Vulnerabilities

CVE-2026-54759: SiYuan: Lute HTML sanitizer allows `<iframe>` tags in Bazaar package README, leading to arbitrary command execution via SiYuan Electron client

• Severity: high (CVSS 8.7 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-24 · updated 2026-10-25
• Weakness: CWE-79

Description

SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, Lute's HTML sanitizer does not remove <iframe> elements. Combined with the SiYuan Electron client's permissive security configuration, an attacker can include a malicious <iframe> in a Bazaar package README that executes arbitrary commands on the victim's machine when the package details are viewed. No package installation is required. This vulnerability is fixed in 3.7.0.

Affected products

• siyuan-note siyuan: before 3.7.0

References

• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-r6v5-4c66-f6pw
• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-r6v5-4c66-f6pw

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