Security readout for executives and security teams
Plain-English summary
A malicious Trilium import file can hide executable content in a map marker title. If a user imports the file and opens its GeoMap, the content runs. On the desktop client, this can become full code execution on the user’s computer, potentially compromising data, credentials, and system integrity.
Executive priority
Treat remediation as immediate for organizations using the desktop client, especially where users exchange or download import archives. Prioritize upgrading to 0.104.0, temporarily block untrusted imports, and investigate suspicious imports already opened. Urgency is driven by potential full-machine compromise, although public evidence supplied here does not establish active exploitation.
Technical view
Trilium versions before 0.104.0 do not sanitize imported note titles under the default Safe import filter. GeoMap inserts marker titles into innerHTML, enabling stored cross-site scripting after user interaction. Because the Electron desktop renderer has Node integration enabled, injected JavaScript can execute with system-level capabilities. CVE-2026-48996 is fixed in 0.104.0.
Likely exposure
Desktop users running Trilium below 0.104.0 are at greatest risk when they import attacker-controlled or untrusted archives and then display an affected GeoMap. Exploitation requires user actions, so merely installing Trilium is insufficient. The supplied evidence does not quantify deployment prevalence or identify confirmed compromised organizations.
Exploitation context
The attack requires delivery of a malicious import archive, followed by import and opening the crafted GeoMap. No privileges are required from the attacker. The source bundle reports that this CVE is not in KEV and provides no evidence of active exploitation; real-world exploitation status is therefore unconfirmed.
Researcher notes
The vulnerability chains insufficient title sanitization with an unsafe GeoMap innerHTML sink. Safe import removes scripts but leaves hostile title markup intact. Desktop impact escalates from stored XSS to code execution because Electron’s renderer exposes Node integration. The vendor advisory and fixing commit support the root cause and remediation; exploitation telemetry and attack prevalence remain unavailable.
Mitigation direction
- Upgrade Trilium desktop clients to version 0.104.0 or later.
- Until upgraded, do not import archives from untrusted or unverified sources.
- Restrict shared import archives to approved distribution channels.
- Investigate endpoints where suspicious archives were imported and their GeoMaps opened.
Validation and detection
- Inventory Trilium installations and identify every version below 0.104.0.
- Confirm upgraded clients report version 0.104.0 or later.
- Review imported notes for unexpected HTML or event-handler content in titles.
- Determine whether users opened GeoMaps from untrusted imports.
- For suspicious activity, review endpoint telemetry associated with the Trilium process.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-94: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-48996 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.3 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H——GitHub_MVulnerability scoring details
Base CVSS 4.0 score
9.3CriticalVector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/TriliumNext/Trilium/security/advisories/GHSA-7qfw-c9gj-2xq2CVE reference, GitHub_M · x_refsource_CONFIRM
- https://github.com/TriliumNext/Trilium/commit/5245ad70f6ecc54e0309fb83e596f15fe5dc5bf6CVE reference, GitHub_M · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Improper Control of Generation of Code ('Code Injection')
Improper Control of Generation of Code ('Code Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.