CVE-2026-33979
CVE-2026-33979 · Express XSS Sanitizer: allowedTags/allowedAttributes bypass leads to permissive sanitization (XSS risk)
Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.
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 · Alta · EPSS 0,4% · Corrección disponible
- Publicación
- Actualización
Pila tecnológica: node
Productos y versiones afectados
express-xss-sanitizer
- Versiones
- < 2.0.2: Afectada
Sin corrección publicada
express-xss-sanitizer npm
- Intervalos de versiones afectados
- SEMVER: < 2.0.2
Actualiza a 2.0.2
Fuentes originales
- https://github.com/AhmedAdelFahim/express-xss-sanitizer/security/advisories/GHSA-3843-rr4g-m8jq
- https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/5623009ef11dcf095c163a38dea07b9cc22ad19f
- https://github.com/AhmedAdelFahim/express-xss-sanitizer/releases/tag/v2.0.2
- https://nvd.nist.gov/vuln/detail/CVE-2026-33979