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Vulnerability record · CVE-2026-73041 · published 15 August 2026

CVE-2026-73041: Cross-site scripting vulnerability

SiYuan versions before v3.7.4 fail to validate or escape annotation fields written to disk by the setFileAnnotation endpoint. Attackers can inject malicious markup into annotation fields that execute as script in the PDF renderer with full Node.js access when a user opens an annotated PDF.

9.4 CVSS 4.0 Critical EPSS 0.43% · top 65.5% CWE-79 · Cross-site scripting Deferred
9.4CVSS 4.0 base score
0.43%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
26 Aug 2026Last modified by NVD

Description

SiYuan versions before v3.7.4 fail to validate or escape annotation fields written to disk by the setFileAnnotation endpoint. Attackers can inject malicious markup into annotation fields that execute as script in the PDF renderer with full Node.js access when a user opens an annotated PDF.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-fqpw-c3pj-w8g9
https://www.vulncheck.com/advisories/siyuan-before-remote-code-execution-via-pdf-annotations
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-fqpw-c3pj-w8g9

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Source: NIST National Vulnerability Database (record CVE-2026-73041), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.