What is CVE-2026-34585?

CVE-2026-34585 is a high-severity vulnerability in Siyuan-note Siyuan, classified under Cross-site Scripting. CVSS score: 8.6/10. Published 2026-03-31.

How severe is CVE-2026-34585?

High severity. CVSS v3 base score is 8.6 out of 10.

RCE in Siyuan-note Siyuan

CVE-2026-34585

SiYuan is a personal knowledge management system. Prior to version 3.6.2, a vulnerability allows crafted block attribute values to bypass server-side attribute escaping when an HTML entity is mixed with raw special characters. An attacker…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (23.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/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-ff66-236v-p4fg (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-2026-34585?: CVE-2026-34585 is a high-severity vulnerability in Siyuan-note Siyuan, classified under Cross-site Scripting. CVSS score: 8.6/10. Published 2026-03-31.
How severe is CVE-2026-34585?: High severity. CVSS v3 base score is 8.6 out of 10.