{"document":{"aggregate_severity":{"namespace":"https://www.suse.com/support/security/rating/","text":"important"},"category":"csaf_security_advisory","csaf_version":"2.0","distribution":{"text":"Copyright 2024 SUSE LLC. All rights reserved.","tlp":{"label":"WHITE","url":"https://www.first.org/tlp/"}},"lang":"en","notes":[{"category":"summary","text":"Security update for python-joserfc","title":"Title of the patch"},{"category":"description","text":"This update for python-joserfc fixes the following issues:\n\nChanges in python-joserfc:\n\n- CVE-2026-27932: unbounded PBKDF2 iteration count can lead to a denial of service (bsc#1259154)\n","title":"Description of the patch"},{"category":"details","text":"openSUSE-Leap-16.0-packagehub-150","title":"Patchnames"},{"category":"legal_disclaimer","text":"CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).","title":"Terms of use"}],"publisher":{"category":"vendor","contact_details":"https://www.suse.com/support/security/contact/","name":"SUSE Product Security Team","namespace":"https://www.suse.com/"},"references":[{"category":"external","summary":"SUSE ratings","url":"https://www.suse.com/support/security/rating/"},{"category":"self","summary":"URL of this CSAF notice","url":"https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_20322-1.json"},{"category":"self","summary":"SUSE Bug 1259154","url":"https://bugzilla.suse.com/1259154"},{"category":"self","summary":"SUSE CVE CVE-2026-27932 page","url":"https://www.suse.com/security/cve/CVE-2026-27932/"}],"title":"Security update for python-joserfc","tracking":{"current_release_date":"2026-03-05T14:32:35Z","generator":{"date":"2026-03-05T14:32:35Z","engine":{"name":"cve-database.git:bin/generate-csaf.pl","version":"1"}},"id":"openSUSE-SU-2026:20322-1","initial_release_date":"2026-03-05T14:32:35Z","revision_history":[{"date":"2026-03-05T14:32:35Z","number":"1","summary":"Current version"}],"status":"final","version":"1"}},"product_tree":{"branches":[{"branches":[{"branches":[{"category":"product_version","name":"python313-joserfc-1.1.0-bp160.2.1.noarch","product":{"name":"python313-joserfc-1.1.0-bp160.2.1.noarch","product_id":"python313-joserfc-1.1.0-bp160.2.1.noarch"}}],"category":"architecture","name":"noarch"},{"branches":[{"category":"product_name","name":"openSUSE Leap 16.0","product":{"name":"openSUSE Leap 16.0","product_id":"openSUSE Leap 16.0"}}],"category":"product_family","name":"SUSE Linux Enterprise"}],"category":"vendor","name":"SUSE"}],"relationships":[{"category":"default_component_of","full_product_name":{"name":"python313-joserfc-1.1.0-bp160.2.1.noarch as component of openSUSE Leap 16.0","product_id":"openSUSE Leap 16.0:python313-joserfc-1.1.0-bp160.2.1.noarch"},"product_reference":"python313-joserfc-1.1.0-bp160.2.1.noarch","relates_to_product_reference":"openSUSE Leap 16.0"}]},"vulnerabilities":[{"cve":"CVE-2026-27932","ids":[{"system_name":"SUSE CVE Page","text":"https://www.suse.com/security/cve/CVE-2026-27932"}],"notes":[{"category":"general","text":"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.","title":"CVE description"}],"product_status":{"recommended":["openSUSE Leap 16.0:python313-joserfc-1.1.0-bp160.2.1.noarch"]},"references":[{"category":"external","summary":"CVE-2026-27932","url":"https://www.suse.com/security/cve/CVE-2026-27932"},{"category":"external","summary":"SUSE Bug 1259154 for CVE-2026-27932","url":"https://bugzilla.suse.com/1259154"}],"remediations":[{"category":"vendor_fix","details":"To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n","product_ids":["openSUSE Leap 16.0:python313-joserfc-1.1.0-bp160.2.1.noarch"]}],"threats":[{"category":"impact","date":"2026-03-05T14:32:35Z","details":"important"}],"title":"CVE-2026-27932"}]}