CVE-2023-4696

CVE-2023-4696 Account Takeover Due to Improper Handling of JWT Tokens in memos v0.13.2 Description I want to shed light on a significant security vulnerability I recently discovered within the usememos/memos system. This vulnerability has the potential to allow any user to modify another user’s...

CVE-2022-39227

CVE-2022-39227 CVE-2022-39227 : Proof of Concept Proof of concept for the CVE-2022-39227. According to this CVE, there is a flaw in the JSON Web Token verification. It is possible with a valid token to re-use its signature with modified claims. Required: 1. A valid JSON Web Token. 2. The backend...

CVE-2026-29000

CVE-2026-29000 — pac4j-jwt JWE Authentication Bypass CTF lab for researching the JWE authentication vulnerability in the pac4j-jwt library CVSS 9.3 Critical · CWE-287 · Affected: pac4j-jwt ← access admin panel ↓ Read sensitive data: employee list, system config, flag Project structure...

kit-jwt

kit-jwt JSON Web Token JWT encoding and decoding for Kit TOC Files File| Description ---|--- .editorconfig| Editor formatting configuration .gitignore| Git ignore rules for build artifacts and dependencies .tool-versions| asdf tool versions Zig, Kit LICENSE| MIT license file README.md| This file...

CVE-2026-50149 Contour has Improper JWT Verification for Non-SNI Requests on Virtual Hosts with Fallback Certificate Enabled

Contour is a Kubernetes ingress controller using Envoy proxy. In versions 1.23.0 through 1.33.4, when an HTTPProxy is configured with incompatible combination of both .spec.virtualhost.tls.enableFallbackCertificate: true and .spec.virtualhost.jwtProviders, Contour does not reject the configuratio...

CVE-2026-55165

Lemur manages TLS certificate creation. Prior to 1.9.2, the JWT verifier in lemur/auth/service.py:130-137 used fetchtokenheader to read headerdata"alg" from an unverified token and passed that attacker-controlled value to decodewithmultiplesecrets. PyJWT 2.x rejects alg=none with the configured...

CVE-2026-55165 Lemur : JWT verifier trusts attacker-supplied alg from token header — defense-in-depth gap; chain-dependent ATO with secret disclosure

Lemur manages TLS certificate creation. Prior to 1.9.2, the JWT verifier in lemur/auth/service.py:130-137 used fetchtokenheader to read headerdata"alg" from an unverified token and passed that attacker-controlled value to decodewithmultiplesecrets. PyJWT 2.x rejects alg=none with the configured...

CVE-2026-18500

CVE-2026-18500 concerns the @fastify/jwt plugin for Fastify. In versions before 10.2.2, a per-request key passed to request.jwtVerify({ key }) can be silently overridden by the plugin’s globally configured secret due to the option merge applying the global key last. This allows an ordinary authen...

CVE-2026-59243

The CVE-2026-59243 vulnerability affects the apache-airflow-providers-fab package before 3.7.3, where the FAB auth manager’s Azure AD OAuth login defaulted verify_signature=False when decoding the ID token. An attacker who can present a forged or unsigned (alg:none) ID token to the OAuth callback...

Security Bulletin: Investigation Assistant App for IBM QRadar SIEM is vulnerable to using components with known vulnerabilities

Summary The product includes vulnerable components e.g., framework libraries that could be identified and exploited with automated tools. Investigation Assistant App for IBM QRadar SIEM has addressed the applicable CVEs in an update. Vulnerability Details CVEID:CVE-2026-48522 DESCRIPTION: PyJWT i...

Security Bulletin: IBM Cloud Pak for Data System (CPDS 1.0) is affected by multiple vulnerabilities due to PyJWT

Summary PyJWT is used by IBM Cloud Pak for Data System 1.0 as a Python library for encoding and decoding JSON Web Tokens JWT for authentication and authorization. Multiple vulnerabilities affect PyJWT. CVE-2026-48522 involves a Server-Side Request Forgery SSRF vulnerability where PyJWKClient pass...

CVE-2026-45363

CVE-2026-45363 affects the ruby-jwt gem (Ruby implementation of JWT). Prior to versions 2.10.3 and 3.2.0, JWT.decode(token, '', true, algorithm: 'HS256') can accept attacker-forged tokens because OpenSSL::HMAC.digest('SHA256', '', payload) yields a valid digest with an empty key, and empty-key pa...

CVE-2026-45069

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 6.4.40, 7.4.12, and 8.0.12, OidcTokenHandler::verifyClaims registered audience aud, issuer iss, and expiry exp checkers but did not pass the mandatory claims list to...

EUVD-2026-37897

Woodpecker gRPC agentid metadata can be spoofed- cross-tenant agent impersonation...

GHSA-G3XR-5W5J-W4Q4 Contour has Improper JWT Verification for Non-SNI Requests on Virtual Hosts with Fallback Certificate Enabled

Impact When an HTTPProxy is configured with incompatible combination of both .spec.virtualhost.tls.enableFallbackCertificate: true and .spec.virtualhost.jwtProviders, Contour does not reject the configuration. Consequently, requests from clients that do not send TLS SNI or send an unrecognized SN...

PT-2026-55460

Name of the Vulnerable Software and Affected Versions Contour versions prior to 1.33.5 Description An issue exists when an HTTPProxy is configured with both .spec.virtualhost.tls.enableFallbackCertificate: true and .spec.virtualhost.jwtProviders. In this scenario, the system fails to reject the...

PyJWKClient: missing scheme allowlist enables CVE-2024-21643-class SSRF + token forgery via file://, ftp://, data: schemes

!NOTE The library does not directly return non-HTTPS URI contents to the attacker; the chained "plant a JWKS to forge tokens" scenario described in the original report requires additional application-layer flaws attacker write access to a filesystem path, untrusted jku derivation that this fix do...

EUVD-2026-32927

Hono: JWT middleware accepts any Authorization scheme, not only Bearer...

CVE-2026-47673

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.21, the jwt and jwk middlewares do not verify that the Authorization header value uses theBearer scheme. Any two-part header value — regardless of the scheme name in the first position — proceeds t...

CVE-2026-47673

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.21, the jwt and jwk middlewares do not verify that the Authorization header value uses theBearer scheme. Any two-part header value — regardless of the scheme name in the first position — proceeds t...