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CVE-2026-31807 - Vulnerability Analysis

MediumCVSS: 6.1

Last Updated: March 11, 2026

SiYuan - Reflected XSS

Published: March 10, 2026Updated: March 11, 2026PoC AvailableRemote Exploitable

Overview

SiYuan < 3.5.10 contains a reflected XSS caused by insufficient SVG sanitization allowing SVG animation elements to inject executable JavaScript in /api/icon/getDynamicIcon endpoint, letting unauthenticated attackers execute scripts.

Severity & Score

Severity: Medium

CVSS Score: 6.1

Impact

Unauthenticated attackers can execute arbitrary JavaScript, leading to session hijacking or other client-side attacks.

Mitigation

Update to version 3.5.10 or later.

References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-5hc8-qmg8-pw27

Related Resources

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Details

CVE ID: CVE-2026-31807
Severity: Medium
CVSS Score: 6.1
Type: reflected_xss
Status: confirmed

CWE

CWE-79

CVSS Metrics

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