What is CVE-2026-34448?

CVE-2026-34448 is a critical-severity vulnerability in Siyuan-note Siyuan, classified under Cross-site Scripting. CVSS score: 9.1/10. Published 2026-03-31.

How severe is CVE-2026-34448?

Critical severity. CVSS v3 base score is 9.1 out of 10.

RCE in Siyuan-note Siyuan

CVE-2026-34448

SiYuan is a personal knowledge management system. Prior to version 3.6.2, an attacker who can place a malicious URL in an Attribute View mAsse field can trigger stored XSS when a victim opens the Gallery or Kanban view with “Cover From ->…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (6.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H.

Affected products

Siyuan-note Siyuan — versions < 3.6.2

Weakness classification (CWE)

References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-rx4h-526q-4458 (x_refsource_CONFIRM)
https://github.com/siyuan-note/siyuan/issues/17246 (x_refsource_MISC)
https://github.com/siyuan-note/siyuan/releases/tag/v3.6.2 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-34448?: CVE-2026-34448 is a critical-severity vulnerability in Siyuan-note Siyuan, classified under Cross-site Scripting. CVSS score: 9.1/10. Published 2026-03-31.
How severe is CVE-2026-34448?: Critical severity. CVSS v3 base score is 9.1 out of 10.