OESA-2026-1923 python-jwcrypto security update

Implements JWK, JWS, JWE specifications with python-cryptography Security Fixes: JWCrypto implements JWK, JWS, and JWE specifications using python-cryptography. Prior to 1.5.7, an unauthenticated attacker can exhaust server memory by sending crafted JWE tokens with ZIP compression. The existing...

Always-Incorrect Control Flow Implementation

Overview Affected versions of this package are vulnerable to Always-Incorrect Control Flow Implementation due to an inverted time comparison in the OIDC JWKS and token cache processes. An attacker can cause expired tokens to be reused or force repeated network requests to the OIDC provider by...

PYSEC-2026-70

JWCrypto implements JWK, JWS, and JWE specifications using python-cryptography. Prior to 1.5.7, an unauthenticated attacker can exhaust server memory by sending crafted JWE tokens with ZIP compression. The existing patch for CVE-2024-28102 limits input token size to 250KB but does not validate th...

CVE-2026-34240

JOSE is a Javascript Object Signing and Encryption JOSE library. Prior to version 0.3.5+1, a vulnerability in jose could allow an unauthenticated, remote attacker to forge valid JWS/JWT tokens by using a key embedded in the JOSE header jwk. The vulnerability exists because key selection could tre...

GHSA-VM9R-H74P-HG97 jose vulnerable to untrusted JWK header key acceptance during signature verification

Impact A vulnerability in jose versions up to and including 0.3.5 could allow an unauthenticated, remote attacker to forge valid JWS/JWT tokens by using a key embedded in the JOSE header jwk. The vulnerability exists because key selection could treat header-provided jwk as a verification candidat...

CVE-2026-34240

JOSE is a Javascript Object Signing and Encryption JOSE library. Prior to version 0.3.5+1, a vulnerability in jose could allow an unauthenticated, remote attacker to forge valid JWS/JWT tokens by using a key embedded in the JOSE header jwk. The vulnerability exists because key selection could tre...

CVE-2026-33996

A flaw was found in LibJWT, a C JSON Web Token Library. When parsing JSON Web Key JWK files for RSA-PSS, the library did not correctly handle cases where NULL values were encountered instead of expected string values. An attacker could exploit this vulnerability by providing a specially crafted J...

Linux Distros Unpatched Vulnerability : CVE-2026-33996

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - LibJWT is a C JSON Web Token Library. Starting in version 3.0.0 and prior to version 3.3.0, the JWK parsing for RSA-PSS did not protect against a NULL value whe...

CVE-2026-33996

LibJWT is a C JSON Web Token Library. Starting in version 3.0.0 and prior to version 3.3.0, the JWK parsing for RSA-PSS did not protect against a NULL value when expecting to parse JSON string values. A specially crafted JWK file could exploit this behavior by using integers in places where the...

CVE-2026-33996

LibJWT (C, the JSON Web Token library) versions prior to 3.3.0 are affected by a NULL value handling bug in JWK parsing for RSA-PSS. In 3.0.0–3.2.x, the parser could misinterpret integers where strings were expected, potentially enabling malformed JWKs to affect parsing. The issue was fixed in 3....

CVE-2026-33996 LibJWT has NULL/bounds validation in JWK octet and RSA PSS parsing

LibJWT is a C JSON Web Token Library. Starting in version 3.0.0 and prior to version 3.3.0, the JWK parsing for RSA-PSS did not protect against a NULL value when expecting to parse JSON string values. A specially crafted JWK file could exploit this behavior by using integers in places where the...

CVE-2026-33996 LibJWT has NULL/bounds validation in JWK octet and RSA PSS parsing

LibJWT is a C JSON Web Token Library. Starting in version 3.0.0 and prior to version 3.3.0, the JWK parsing for RSA-PSS did not protect against a NULL value when expecting to parse JSON string values. A specially crafted JWK file could exploit this behavior by using integers in places where the...

libjwt 代码问题漏洞

LibJWT is a C-language library developed by Ben Collins, designed for generating and verifying JSON Web Tokens. Versions of LibJWT from 3.0.0 to 3.3.0 contained code vulnerabilities. These vulnerabilities stemmed from RSA-PSS’s JWK parsing mechanism, which did not properly handle empty values,...

CVE-2026-4603

Versions of the package jsrsasign before 11.1.1 are vulnerable to Division by zero due to the RSASetPublic/KEYUTIL parsing path in ext/rsa.js and the BigInteger.modPowInt reduction logic in ext/jsbn.js. An attacker can force RSA public-key operations e.g., verify and encryption to collapse to...

CVE-2026-4603

Versions of the package jsrsasign before 11.1.1 are vulnerable to Division by zero due to the RSASetPublic/KEYUTIL parsing path in ext/rsa.js and the BigInteger.modPowInt reduction logic in ext/jsbn.js. An attacker can force RSA public-key operations e.g., verify and encryption to collapse to...

CVE-2026-4603

Versions of the package jsrsasign before 11.1.1 are vulnerable to Division by zero due to the RSASetPublic/KEYUTIL parsing path in ext/rsa.js and the BigInteger.modPowInt reduction logic in ext/jsbn.js. An attacker can force RSA public-key operations e.g., verify and encryption to collapse to...

PT-2026-27059

Name of the Vulnerable Software and Affected Versions jsrsasign versions prior to 11.1.1 Description The jsrsasign package contains a flaw related to division by zero. This issue stems from the RSASetPublic/KEYUTIL parsing path within the 'ext/rsa.js' file and the BigInteger.modPowInt reduction...

CVE-2026-27962

A flaw was found in Authlib, a Python library used for creating secure authentication and authorization systems. This vulnerability, known as JWK JSON Web Key Header Injection, affects how Authlib verifies digital signatures in JWS JSON Web Signature tokens. An attacker can exploit this by creati...

UBUNTU-CVE-2026-27962

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.9, a JWK Header Injection vulnerability in authlib's JWS implementation allows an unauthenticated attacker to forge arbitrary JWT tokens that pass signature verification. When key=None is passed to any...

CVE-2026-27962 Authlib JWS JWK Header Injection: Signature Verification Bypass

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.9, a JWK Header Injection vulnerability in authlib's JWS implementation allows an unauthenticated attacker to forge arbitrary JWT tokens that pass signature verification. When key=None is passed to any...