CVE-2026-33979

HIGH

8.2

Beschreibung

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.

CVE Details

CVSS v3.1 Bewertung8.2

SchweregradHIGH

CVSS VektorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

AngriffsvektorNETWORK

KomplexitatLOW

Erforderliche PrivilegienNONE

BenutzerinteraktionNONE

Veroffentlicht3/27/2026

Zuletzt geandert3/31/2026

Quellenvd

Honeypot-Sichtungen0

Betroffene Produkte

express_xss_sanitizer_project:express_xss_sanitizer

Schwachen (CWE)

CWE-79CWE-183

Referenzen

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)

IOC Korrelationen

Keine Korrelationen erfasst

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