What is CVE-2026-39311?

CVE-2026-39311 is a medium-severity vulnerability in Triliumnext Trilium, classified under Cross-site Scripting. CVSS score: 6.8/10. Published 2026-05-20.

How severe is CVE-2026-39311?

Medium severity. CVSS v3 base score is 6.8 out of 10.

RCE in Triliumnext Trilium

CVE-2026-39311

Trilium Notes is a cross-platform, hierarchical note taking application focused on building large personal knowledge bases. Versions 0.102.1 and prior contain a critical security flaw where lack of SVG sanitization combined with a disabled…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (31.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:H.

Affected products

Triliumnext Trilium — versions < 0.102.2

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-39311?: CVE-2026-39311 is a medium-severity vulnerability in Triliumnext Trilium, classified under Cross-site Scripting. CVSS score: 6.8/10. Published 2026-05-20.
How severe is CVE-2026-39311?: Medium severity. CVSS v3 base score is 6.8 out of 10.