CVE-2026-44699

A flaw was found in libjwt. This vulnerability allows a remote attacker to bypass authentication by forging a valid JSON Web Token JWT. The flaw occurs because libjwt accepts an RSA JSON Web Key JWK that does not contain an 'alg' parameter as the verification key for HMAC-based tokens. This leads...

SUSE CVE-2026-44699

LibJWT is a C JSON Web Token Library. From 3.0.0 to 3.3.2, libjwt accepts an RSA JWK that does not contain an alg parameter as the verification key for an HS256/HS384/HS512 token. In the OpenSSL backend, this causes HMAC verification to run with a zero-length key, so an attacker can forge a valid...

Linux Distros Unpatched Vulnerability : CVE-2026-44699

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. From 3.0.0 to 3.3.2, libjwt accepts an RSA JWK that does not contain an alg parameter as the verification key for an...

CVE-2026-44699

LibJWT is a C JSON Web Token Library. From 3.0.0 to 3.3.2, libjwt accepts an RSA JWK that does not contain an alg parameter as the verification key for an HS256/HS384/HS512 token. In the OpenSSL backend, this causes HMAC verification to run with a zero-length key, so an attacker can forge a valid...

UBUNTU-CVE-2026-44699

LibJWT is a C JSON Web Token Library. From 3.0.0 to 3.3.2, libjwt accepts an RSA JWK that does not contain an alg parameter as the verification key for an HS256/HS384/HS512 token. In the OpenSSL backend, this causes HMAC verification to run with a zero-length key, so an attacker can forge a valid...

CVE-2026-44699

LibJWT is a C JSON Web Token Library. From 3.0.0 to 3.3.2, libjwt accepts an RSA JWK that does not contain an alg parameter as the verification key for an HS256/HS384/HS512 token. In the OpenSSL backend, this causes HMAC verification to run with a zero-length key, so an attacker can forge a valid...

CVE-2026-44699

LibJWT (C JSON Web Token library) versions 3.0.0–3.3.2 are vulnerable when an RSA JWK without an alg parameter is used as the verification key for HS256/HS384/HS512. In the OpenSSL backend, this can cause HMAC verification to run with a zero-length key, enabling an attacker to forge a valid JWT w...

CVE-2026-44699 LibJWT: Algorithm confusion allows JWT forgery with RSA JWK as empty-key HMAC

LibJWT is a C JSON Web Token Library. From 3.0.0 to 3.3.2, libjwt accepts an RSA JWK that does not contain an alg parameter as the verification key for an HS256/HS384/HS512 token. In the OpenSSL backend, this causes HMAC verification to run with a zero-length key, so an attacker can forge a valid...

CVE-2026-44699

LibJWT is a C JSON Web Token Library. From 3.0.0 to 3.3.2, libjwt accepts an RSA JWK that does not contain an alg parameter as the verification key for an HS256/HS384/HS512 token. In the OpenSSL backend, this causes HMAC verification to run with a zero-length key, so an attacker can forge a valid...

PT-2026-41315

Name of the Vulnerable Software and Affected Versions LibJWT versions 3.0.0 through 3.3.2 Description LibJWT accepts an RSA JSON Web Key JWK lacking an alg parameter as the verification key for HS256, HS384, or HS512 tokens. When using the OpenSSL backend, this results in HMAC verification...

libjwt 加密问题漏洞

LibJWT is a C-language library developed by Ben Collins, designed for generating and verifying JSON Web Tokens. Versions 3.0.0 to 3.3.2 of LibJWT contain vulnerabilities related to encryption. These vulnerabilities arise from accepting RSA JWKs without an alg parameter as the verification key for...

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...

DEBIAN-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...

UBUNTU-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 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...

EUVD-2026-16899

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...

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 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...