CVE Catalog

CVE-2026-91127

HighCVSS 8.2
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.40%

31th percentile - higher than 31% of all known CVEs

Summary

File Viewer is a browser-native viewer for Office, PDF, CAD, archive, and other files in private and internal web applications. Prior to @file-viewer/doc 2.3.1 and msdoc-viewer 0.2.2, the legacy DOC renderer emitted document-controlled hyperlink targets into generated HTML after character escaping but without restricting URL schemes, allowing script execution in the embedding application's origin when a user clicked the link.

Risk Assessment

An attacker can deliver a crafted DOC file that, when a user clicks a link, executes malicious script in the context of the embedding application. This can lead to data theft or user session takeover.

Recommendation

Update @file-viewer/doc to version 2.3.1 or later and msdoc-viewer to version 0.2.2 or later. Consider blocking external document links by default.

Related vulnerabilities

Original NVD description (English source)

File Viewer is a browser-native viewer for Office, PDF, CAD, archive, and other files in private and internal web applications. Prior to @file-viewer/doc 2.3.1 and msdoc-viewer 0.2.2, the legacy DOC renderer emitted document-controlled hyperlink targets into generated HTML after character escaping but without restricting URL schemes. A crafted legacy DOC file could place javascript:, vbscript:, data:, or another unsafe scheme in a rendered link, and script could execute in the embedding application's origin when a user clicked the link. The fix blocks external document links by default, allows only HTTP(S), mail, telephone, safe relative URLs, and internal bookmarks when external links are explicitly enabled, and applies mount-boundary sanitization as defense in depth. This issue is fixed in @file-viewer/doc 2.3.1 and msdoc-viewer 0.2.2.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS