Is CVE-2026-34605 actively exploited?

No active exploitation of CVE-2026-34605 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-34605 be exploited remotely?

Yes. CVE-2026-34605 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-34605?

CVE-2026-34605 has a CVSS score of 6.1 (MEDIUM).

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MEDIUM

CVE-2026-34605

CWE-79Published: March 31, 2026· Updated: Apr 3, 2026

6.1

CVSS v3.1

EPSS:1.07%probability of exploitation in 30 daysPercentile:77.7th

Official Description

SiYuan is a personal knowledge management system. From version 3.6.0 to before version 3.6.2, the SanitizeSVG function introduced in version 3.6.0 to fix XSS in the unauthenticated /api/icon/getDynamicIcon endpoint can be bypassed by using namespace-prefixed element names such as <x:script xmlns:x="http://www.w3.org/2000/svg">. The Go HTML5 parser records the element's tag as "x:script" rather than "script", so the tag check passes it through. The SVG is served with Content-Type: image/svg+xml and no Content Security Policy; when a browser opens the response directly, its XML parser resolves the prefix to the SVG namespace and executes the embedded script. This issue has been patched in version 3.6.2.

NVD Source

Technical Analysis

CVE-2026-34605 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.