CVE-2026-33979

HIGH

8.2

Description

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.

Details CVE

Score CVSS v3.18.2

SeveriteHIGH

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurNONE

Publie3/27/2026

Derniere modification3/31/2026

Sourcenvd

Observations honeypot0

Produits affectes

express_xss_sanitizer_project:express_xss_sanitizer

Faiblesses (CWE)

CWE-79CWE-183

References

https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/5623009ef11dcf095c163a38dea07b9cc22ad19f(security-advisories@github.com)

https://github.com/AhmedAdelFahim/express-xss-sanitizer/releases/tag/v2.0.2(security-advisories@github.com)

https://github.com/AhmedAdelFahim/express-xss-sanitizer/security/advisories/GHSA-3843-rr4g-m8jq(security-advisories@github.com)

Correlations IOC

Aucune correlation enregistree

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