CVE-2026-35593: Trilium Notes has Local File Inclusion via upload modified file API endpoint
Trilium Notes is an open-source, cross-platform hierarchical note taking application for building large personal knowledge bases. Versions 0.102.1 and prior are vulnerable to Local File Inclusion, allowing an authenticated attacker to read sensitive arbitrary files from the server's filesystem. The uploadModifiedFileToAttachment function, which is called when a POST request is received to /api/attachments/{attachmentId}/upload-modified-file, replaces the content of the attachment with the content from another file (whose path is provided in filePath of Request body). After which the content of the attachment can be viewed at /api/attachments/{attachmentId}/download. This exposes sensitive system files such as SSH keys, credentials, configs, and OS files, potentially leading to remote code execution and compromise of co-hosted applications. This issue has been fixed in version 0.102.2.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-35593?
The severity of CVE-2026-35593 is classified as medium due to its potential for local file inclusion vulnerabilities.
How do I fix CVE-2026-35593?
To fix CVE-2026-35593, you should update Trilium Notes to version 0.102.2 or later.
What is the impact of CVE-2026-35593 on my system?
CVE-2026-35593 can allow attackers to access sensitive files on the server through local file inclusion.
Who is affected by CVE-2026-35593?
CVE-2026-35593 affects all users of Trilium Notes versions 0.102.1 and prior.
Is it safe to use Trilium Notes after CVE-2026-35593?
Using Trilium Notes versions 0.102.1 and prior is not safe due to the vulnerability identified in CVE-2026-35593, so an upgrade is necessary.