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Vulnerabilities

Vulnerability · CVE-2026-77438

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-2026-77438. EPSS is 0.42%. 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
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.42%
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 public share-search endpoint does not enforce the per-note shareCredentials and shareHiddenFromTree controls, allowing an unauthenticated visitor to read the titles, tree paths, and content of protected shared notes. The endpoint authorizes only the ancestor note supplied in the request and then runs a full-text search across the entire published subtree, returning each matching note's title, share identifier, and hierarchical path without re-checking whether that individual note requires a share password or is hidden from the navigation tree. Because the search matches note content, an attacker can enumerate protected notes and use the endpoint as a boolean oracle that confirms arbitrary substrings, recovering the full contents of notes that should be gated behind a password. 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-2026-77438

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-2026-77438. EPSS is 0.42%. 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-200: Exposure of Sensitive Information; CWE-863: Incorrect Authorization. EPSS 0.42%. 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 public share-search endpoint does not enforce the per-note shareCredentials and shareHiddenFromTree controls, allowing an unauthenticated visitor to read the titles, tree paths, and content of protected shared notes. The endpoint authorizes only the ancestor note supplied in the request and

  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 public share-search endpoint does not enforce the per-note shareCredentials and shareHiddenFromTree controls, allowing an unauthenticated visitor to read the titles, tree paths, and content of protected shared notes. The endpoint authorizes only the ancestor note supplied in the request and

Sources

  • CVE.orgVulnerability recordCVE-2026-77438

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-77438

    30-day exploitation probability 0.4%

    first.org
  • NIST NVDVulnerability recordCVE-2026-77438

    Trilium is an open-source hierarchical note-taking application. In versions up to and including 0.103.0, the public share-search endpoint does not enforce the per-note shareCredentials and shareHiddenFromTree controls, allowing an unauthenticated visitor to read the titles, tree

    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.