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    CVE-2026-45733

    Trilium Notes is a cross-platform, hierarchical note taking application focused on building large personal knowledge bases. Prior to 0.103.0, the #iconClass label value is returned raw by getNoteIcon() and inserted without HTML attribute encoding into class attributes in apps/client/src/widgets/quick_search.ts and apps/client/src/services/note_autocomplete.ts, allowing a stored payload to execute automatically when a victim opens a new tab or uses Ctrl+J and, because Electron enables nodeIntegration and disables contextIsolation, run operating-system commands as the victim. This issue is fixed in version 0.103.0.

    Published:Aug 18, 2026
    Last Modified:Aug 18, 2026
    EPS:Aug 18, 2026
    EPSS Score:
    CVSS Score:8.3

    Affected Products

    Vendor
    Triliumnext
    Product
    Trilium

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs
    CAPEC-107 Cross Site Tracing
    CAPEC-127 Directory Indexing
    CAPEC-17 Using Malicious Files
    CAPEC-20 Encryption Brute Forcing
    CAPEC-209 XSS Using MIME Type Mismatch
    CAPEC-22 Exploiting Trust in Client
    CAPEC-237 Escaping a Sandbox by Calling Code in Another Language
    CAPEC-243 XSS Targeting HTML Attributes
    CAPEC-244 XSS Targeting URI Placeholders
    CAPEC-36 Using Unpublished Interfaces or Functionality
    CAPEC-477 Signature Spoofing by Mixing Signed and Unsigned Content
    CAPEC-480 Escaping Virtualization
    CAPEC-51 Poison Web Service Registry
    CAPEC-57 Utilizing REST's Trust in the System Resource to Obtain Sensitive Data
    CAPEC-588 DOM-Based XSS
    CAPEC-59 Session Credential Falsification through Prediction
    CAPEC-591 Reflected XSS
    CAPEC-592 Stored XSS
    CAPEC-63 Cross-Site Scripting (XSS)
    CAPEC-65 Sniff Application Code
    CAPEC-668 Key Negotiation of Bluetooth Attack (KNOB)
    CAPEC-74 Manipulating State
    CAPEC-85 AJAX Footprinting
    CAPEC-87 Forceful Browsing

    Related CVEs

    CVE-2026-77438 (CVSS 7.5) — Trilium is an open-source hierarchical note-taking application. In versions up to and including 0.103.0, the p…
    CVE-2026-53580 (CVSS 8.1) — Trilium is an open-source hierarchical note-taking application. In versions prior to 0.104.0, the automatic im…
    CVE-2026-53579 (CVSS 9.3) — Trilium is an open-source hierarchical note-taking application. In versions up to and including 0.103.0, the d…
    CVE-2026-53578 (CVSS 9.3) — Trilium is an open-source hierarchical note-taking application. In versions up to and including 0.103.0, the d…
    CVE-2026-48996 (CVSS 9.3) — Trilium is an open-source hierarchical note-taking application. In versions up to and including 0.103.0, the d…
    CVE-2026-47727 (CVSS 8.6) — Trilium is an open-source hierarchical note-taking application. In versions prior to 0.104.0, the default-on "…
    CVE-2026-45668 (CVSS 9.3) — Trilium Notes is a cross-platform, hierarchical note taking application focused on building large personal kno…
    CVE-2026-39311 (CVSS 6.8) — Trilium Notes is a cross-platform, hierarchical note taking application focused on building large personal kno…
    CVE-2026-39310 (CVSS 8.6) — Trilium Notes is a cross-platform, hierarchical note taking application focused on building large personal kno…
    CVE-2026-39309 (CVSS 5.5) — Trilium Notes is a cross-platform, hierarchical note taking application focused on building large personal kno…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High