CVE-2026-33979

CVE-2026-33979 · Express XSS Sanitizer: allowedTags/allowedAttributes bypass leads to permissive sanitization (XSS risk)

Cette page présente des faits issus de sources publiques. Consultez l’avis original avant toute mise à jour.

Express XSS Sanitizer is Express 4.x and 5.x middleware which sanitizes user input data (in req.body, req.query, req.headers and req.params) to prevent Cross Site Scripting (XSS) attack. A vulnerability has been identified in versions prior to 2.0.2 where restrictive sanitization configurations are silently ignored. In version 2.0.2, the validation logic has been updated to respect explicitly provided empty configurations. Now, if allowedTags or allowedAttributes are provided (even if empty), they are passed directly to sanitize-html without being overridden.

CVSS 8.2 · Élevée · EPSS 0,4% · Correctif disponible

Publication

2026-03-27T21:29:19.759Z

Mise à jour

2026-03-31T14:29:43.694Z

Pile logicielle: node

Vérifiez votre serveur →