Security update for python-joserfc SUSE Patch security@suse.de SUSE Security Team openSUSE-SU-2026:20322-1 Final 1 1 2026-03-05T14:32:35Z current 2026-03-05T14:32:35Z 2026-03-05T14:32:35Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for python-joserfc This update for python-joserfc fixes the following issues: Changes in python-joserfc: - CVE-2026-27932: unbounded PBKDF2 iteration count can lead to a denial of service (bsc#1259154) The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). openSUSE-Leap-16.0-packagehub-150 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1259154 SUSE Bug 1259154 https://www.suse.com/security/cve/CVE-2026-27932/ SUSE CVE CVE-2026-27932 page openSUSE Leap 16.0 python313-joserfc-1.1.0-bp160.2.1 python313-joserfc-1.1.0-bp160.2.1 as a component of openSUSE Leap 16.0 joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. In 1.6.2 and earlier, a resource exhaustion vulnerability in joserfc allows an unauthenticated attacker to cause a Denial of Service (DoS) via CPU exhaustion. When the library decrypts a JSON Web Encryption (JWE) token using Password-Based Encryption (PBES2) algorithms, it reads the p2c (PBES2 Count) parameter directly from the token's protected header. This parameter defines the number of iterations for the PBKDF2 key derivation function. Because joserfc does not validate or bound this value, an attacker can specify an extremely large iteration count (e.g., 2^31 - 1), forcing the server to expend massive CPU resources processing a single token. This vulnerability exists at the JWA layer and impacts all high-level JWE and JWT decryption interfaces if PBES2 algorithms are allowed by the application's policy. CVE-2026-27932 openSUSE Leap 16.0:python313-joserfc-1.1.0-bp160.2.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/security/cve/CVE-2026-27932.html CVE-2026-27932 https://bugzilla.suse.com/1259154 SUSE Bug 1259154