Answer in brief
CVE-2026-91021 records a Medium severity (CVSS 5.4) vulnerability in CVE-2026-91021. The current sources do not mark it as known exploited. The current feed maps Trilium/Trillium Notes (generic), Trilium/Trillium Notes (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Trilium/Trillium Notes (generic), Trilium/Trillium Notes (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Trilium/Trillium Notesgeneric | >=0 <=v0.103.0 | Not reported |
| Trilium/Trillium Notesgeneric | 0 | Not reported |
Published upstream
Sep 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 14, 2026
Trilium Notes, version v0.103.0 and earlier, contains a stored cross-site scripting (XSS) vulnerability in the share renderer for webView notes due to improper HTML escaping of user-controlled #webViewSrc values. This vulnerability allows attackers with note-authoring privileges to inject arbitrary JavaScript that executes for any user who opens the shared note, including administrators.
Quoted source text, attributed separately from HOL analysis.