CVE-2026-34448 is a critical stored Cross-Site Scripting (XSS) vulnerability affecting SiYuan personal knowledge management systems prior to version 3.6.2. An attacker with low privileges can inject a malicious URL into an Attribute View field, which, when viewed by a victim in specific configurations, executes arbitrary code leading to OS command execution on the Electron desktop client. This flaw carries a CVSS score of 9.0 (Critical) due to its high impact on confidentiality, integrity, and availability, requiring user interaction but having low attack complexity. While there is no public exploit code available and it is not currently known to be actively exploited, the vulnerability has garnered some community discussion. The issue has been patched in version 3.6.2.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 3.6.2CPE matchmatch criteria | cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.6 Bluesky, 0.3 Mastodon, and 1.6 GitHub mentions.
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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.