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Vulnerabilities

Vulnerability · CVE-2026-53579

Trilium is an open-source hierarchical note-taking application.

Published Aug 27, 2026 · catalog updated Oct 14, 2026 · Trilium is an open-source

Check if you run it

No confirmed exploitation is on record for CVE-2026-53579. EPSS is 0.25%. Act only if a listed version of Trilium is an open-source is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Trilium is an open-source).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.25%
Remediation
Version ranges on file
Affected products
cpe triliumnotes/trilium · stated trilium

Trilium is an open-source hierarchical note-taking application. In versions up to and including 0.103.0, the default-on "Safe import" filter sanitizes HTML only for text notes and excludes the book note type, whose content is stored without sanitization and later rendered as HTML, allowing an attacker-supplied import archive to embed a payload that executes as script. A book note's content is routed through the same rendering path as text notes and injected into the page with jQuery's html method when the note is shown as a grid-view preview card, so a malicious note survives Safe import and runs as soon as the victim opens the containing note. On the desktop client the Electron renderer runs with Node integration enabled, so the injected JavaScript escalates from cross-site scripting to full remote code execution on the victim's machine. This issue is fixed in version 0.104.0.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe triliumnotes/triliumversion unspecified
  • stated trilium<= 0.103.0

How to fix CVE-2026-53579

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-53579. EPSS is 0.25%. Act only if a listed version of Trilium is an open-source is installed.

Which versions are affected?

Compare what you have installed with <= 0.103.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-79: Cross-site Scripting (XSS); CWE-94: Code Injection. EPSS 0.25%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 27, 2026 · NIST NVD

    Detected

    Trilium is an open-source hierarchical note-taking application. In versions up to and including 0.103.0, the default-on "Safe import" filter sanitizes HTML only for text notes and excludes the book note type, whose content is stored without sanitization and later rendered as HTML, allowing an attacker-supplied import archive to embed a payload that executes as script. A book note's content is rout

  2. Oct 14, 2026 · NIST NVD

    Updated

    Trilium is an open-source hierarchical note-taking application. In versions up to and including 0.103.0, the default-on "Safe import" filter sanitizes HTML only for text notes and excludes the book note type, whose content is stored without sanitization and later rendered as HTML, allowing an attacker-supplied import archive to embed a payload that executes as script. A book note's content is rout

Sources

  • CVE.orgVulnerability recordCVE-2026-53579

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-53579

    30-day exploitation probability 0.3%

    first.org
  • NIST NVDVulnerability recordCVE-2026-53579

    Trilium is an open-source hierarchical note-taking application. In versions up to and including 0.103.0, the default-on "Safe import" filter sanitizes HTML only for text notes and excludes the book note type, whose content is stored without sanitization and later rendered as HTML

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.