CVE-2026-77438
High · CVSS 7.5Published 2026-08-27
CVSS
7.5
High
EPSS
—
exploit probability
Active Exploit
No
not yet listed
What is CVE-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 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.
CVSS Score Explained
CVSS 7.5 is High severity. Exploitation is likely straightforward and the impact is significant — data loss, privilege escalation, or remote code execution are common outcomes. Patch as soon as possible.
EPSS Exploitation Probability
No EPSS score yet — model needs more data on this CVE.
References & Patches
- ›https://github.com/TriliumNext/Trilium/commit/49fc7b67d9d49f01833e1ad9712ec83b079f98d2
- ›https://github.com/TriliumNext/Trilium/security/advisories/GHSA-6rxv-6w3q-7mv9
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