CVE-2026-21003-JWT-none-Algorithm-Bypass-via-kid-Header-Omission

CVE-2026-21003 – Bypass dell'algoritmo JWT "none" tramite omissione dell'header kid Codice del programma Node.js root@kitploit: // jwtverifyserver.js - Vulnerable JWT verification const jwt = require'jsonwebtoken'; const express = require'express'; const app = express; app.useexpress.json; const...

CVE-2026-18675

The dataplane token validator in kuma-cp performs an unchecked Go type assertion on the JWT kid header. A token whose kid is a JSON number decodes as a float64 and triggers a runtime panic before any signature, claims, or authorization check runs. The panic terminates the entire kuma-cp process,...

jwt-attack-suite

JWT Attack Suite Offensive JWT testing toolkit for penetrat...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the fetchKey function. An attacker can cause the server to make arbitrary HTTP requests to attacker-controlled destinations by crafting a JWT with malicious claim values that are interpolated into th...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the fetchKey function. An attacker can cause the server to make arbitrary HTTP requests to attacker-controlled destinations by crafting a JWT with malicious claim values that are interpolated into th...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the fetchKey function. An attacker can cause the server to make arbitrary HTTP requests to attacker-controlled destinations by crafting a JWT with malicious claim values that are interpolated into th...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the fetchKey function. An attacker can cause the server to make arbitrary HTTP requests to attacker-controlled destinations by crafting a JWT with malicious claim values that are interpolated into th...

GHSA-8XF4-W7QW-PJJW Firebase PHP-JWT key/algorithm type confusion

In Firebase PHP-JWT before 6.0.0, an algorithm-confusion issue e.g., RS256 / HS256 exists via the kid aka Key ID header, when multiple types of keys are loaded in a key ring. This allows an attacker to forge tokens that validate under the incorrect key. NOTE: this provides a straightforward way t...

Firebase PHP-JWT key/algorithm type confusion

In Firebase PHP-JWT before 6.0.0, an algorithm-confusion issue e.g., RS256 / HS256 exists via the kid aka Key ID header, when multiple types of keys are loaded in a key ring. This allows an attacker to forge tokens that validate under the incorrect key. NOTE: this provides a straightforward way t...

Design/Logic Flaw

In Firebase PHP-JWT before 6.0.0, an algorithm-confusion issue e.g., RS256 / HS256 exists via the kid aka Key ID header, when multiple types of keys are loaded in a key ring. This allows an attacker to forge tokens that validate under the incorrect key. NOTE: this provides a straightforward way t...

CVE-2021-46743

CVE-2021-46743 : In Firebase PHP-JWT before 6.0.0, an algorithm-confusion issue occurs via the kid header when multiple key types are loaded in a key ring, allowing an attacker to forge tokens that validate under the incorrect key. The description notes this may reflect unsafe usage of the PHP-JW...