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PatchSiren cyber security CVE debrief

CVE-2026-47727 TriliumNext CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-27T20:17:44.780Z and has not been modified since then. The NVD entry is currently 8.6 HIGH. This vulnerability affects Trilium's hierarchical note-taking application, specifically versions prior to 0.104.0, due to the default-on 'Safe import' filter failing to neutralize the shareTemplate relation. This allows an attacker-supplied import archive to plant a server-side template that leads to remote code execution when the victim publishes the imported note. The vulnerability could potentially allow an attacker to execute arbitrary JavaScript with full access to require, process, the filesystem, and the network. Users and administrators should be aware of this vulnerability and take necessary actions to mitigate the risk. The CVSS score of 8.6 indicates a high severity vulnerability.

Vendor
TriliumNext
Product
Trilium
CVSS
HIGH 8.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-27
Original CVE updated
2026-09-01
Advisory published
2026-08-27
Advisory updated
2026-09-01

Who should care

Users and administrators of Trilium hierarchical note-taking application versions prior to 0.104.0 should be aware of this vulnerability and take necessary actions to mitigate the risk.

Technical summary

The default-on 'Safe import' filter in Trilium versions prior to 0.104.0 fails to neutralize the shareTemplate relation, allowing an attacker-supplied import archive to plant a server-side template that leads to remote code execution when the victim publishes the imported note, potentially allowing an attacker to execute arbitrary JavaScript with full access to require, process, the filesystem, and the network.

Defensive priority

CVE-2026-47727 is rated HIGH and should be prioritized for defensive actions due to its CVSS score of 8.6, indicating a high severity vulnerability in Trilium's hierarchical note-taking application.

Recommended defensive actions

  • Review and apply the patch in version 0.104.0 or later to fix the vulnerability.
  • Restrict access to the Trilium application to trusted users only.
  • Monitor the Trilium application for suspicious activity, such as unexpected note publications or modifications.
  • Consider implementing additional security controls, such as input validation and sanitization, to prevent similar attacks in the future.
  • Inventory and verify the versions of Trilium in use within the organization to identify potential vulnerabilities.

Evidence notes

The default-on 'Safe import' filter in Trilium versions prior to 0.104.0 fails to neutralize the shareTemplate relation, allowing an attacker-supplied import archive to plant a server-side template that leads to remote code execution when the victim publishes the imported note.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-47727 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-47727

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-47727 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-47727

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.