CVE-2026-34605 identifies a reflected Cross-Site Scripting (XSS) vulnerability in SiYuan personal knowledge management system versions 3.6.0 through 3.6.1. This flaw allows an unauthenticated attacker to bypass the SanitizeSVG function in the /api/icon/getDynamicIcon endpoint using namespace-prefixed SVG elements, leading to arbitrary script execution in a user's browser. Rated with a CVSSv4 score of 8.6 (HIGH), the vulnerability has a network attack vector, low attack complexity, and requires user interaction, posing a high risk to confidentiality and integrity. There is currently no evidence of active exploitation, and public exploit code is not available, though it has received minor community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 3.6.0, < 3.6.2CPE matchmatch criteria | cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/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:X/V:X/RE:X/U:X
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The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.