Red Hat Product Errata RHSA-2026:19042 - Security Advisory Issued: 2026-05-19 Updated: 2026-05-19 RHSA-2026:19042 - Security Advisory Overview Updated Packages Synopsis Low: python-jwcrypto security update Type/Severity Security Advisory: Low Red Hat Lightspeed patch analysis Identify and remediate systems affected by this advisory. View affected systems Topic An update for python-jwcrypto is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Low. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Description Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fix(es): JWCrypto: python-cryptography: python: JWCrypto: Memory exhaustion via crafted compressed JWE tokens (CVE-2026-39373) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Solution For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Affected Products Red Hat Enterprise Linux for x86_64 10 x86_64 Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.2 x86_64 Red Hat Enterprise Linux for IBM z Systems 10 s390x Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 10.2 s390x Red Hat Enterprise Linux for Power, little endian 10 ppc64le Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.2 ppc64le Red Hat Enterprise Linux for ARM 64 10 aarch64 Red Hat Enterprise Linux for ARM 64 - Extended Update Support 10.2 aarch64 Red Hat Enterprise Linux for ARM 64 - 4 years of updates 10.2 aarch64 Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 10.2 s390x Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.2 ppc64le Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.2 x86_64 Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 10.2 x86_64 Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 10.2 aarch64 Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 10.2 ppc64le Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 10.2 s390x Fixes BZ - 2456187 - CVE-2026-39373 JWCrypto: python-cryptography: python: JWCrypto: Memory exhaustion via crafted compressed JWE tokens CVEs CVE-2026-39373 References https://access.redhat.com/security/updates/classification/#low Note: More recent versions of these packages may be available. 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Red Hat Enterprise Linux for x86_64 10 SRPM python-jwcrypto-1.5.6-5.el10_2.src.rpm SHA-256: 3441b687496b42495f8e21c8be4d8bd559797b15cee3bddbb43d3e5010568861 x86_64 python3-jwcrypto-1.5.6-5.el10_2.noarch.rpm SHA-256: 4138ba5252d6c91c93187940d9dd01165d050955ac687849ae33ba8884458f1b Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.2 SRPM python-jwcrypto-1.5.6-5.el10_2.src.rpm SHA-256: 3441b687496b42495f8e21c8be4d8bd559797b15cee3bddbb43d3e5010568861 x86_64 python3-jwcrypto-1.5.6-5.el10_2.noarch.rpm SHA-256: 4138ba5252d6c91c93187940d9dd01165d050955ac687849ae33ba8884458f1b Red Hat Enterprise Linux for IBM z Systems 10 SRPM python-jwcrypto-1.5.6-5.el10_2.src.rpm SHA-256: 3441b687496b42495f8e21c8be4d8bd559797b15cee3bddbb43d3e5010568861 s390x python3-jwcrypto-1.5.6-5.el10_2.noarch.rpm SHA-256: 4138ba5252d6c91c93187940d9dd01165d050955ac687849ae33ba8884458f1b Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 10.2 SRPM python-jwcrypto-1.5.6-5.el10_2.src.rpm SHA-256: 3441b687496b42495f8e21c8be4d8bd559797b15cee3bddbb43d3e5010568861 s390x python3-jwcrypto-1.5.6-5.el10_2.noarch.rpm SHA-256: 4138ba5252d6c91c93187940d9dd01165d050955ac687849ae33ba8884458f1b Red Hat Enterprise Linux for Power, little endian 10 SRPM python-jwcrypto-1.5.6-5.el10_2.src.rpm SHA-256: 3441b687496b42495f8e21c8be4d8bd559797b15cee3bddbb43d3e5010568861 ppc64le python3-jwcrypto-1.5.6-5.el10_2.noarch.rpm SHA-256: 4138ba5252d6c91c93187940d9dd01165d050955ac687849ae33ba8884458f1b Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.2 SRPM python-jwcrypto-1.5.6-5.el10_2.src.rpm SHA-256: 3441b687496b42495f8e21c8be4d8bd559797b15cee3bddbb43d3e5010568861 ppc64le python3-jwcrypto-1.5.6-5.el10_2.noarch.rpm SHA-256: 4138ba5252d6c91c93187940d9dd01165d050955ac687849ae33ba8884458f1b Red Hat Enterprise Linux for ARM 64 10 SRPM python-jwcrypto-1.5.6-5.el10_2.src.rpm SHA-256: 3441b687496b42495f8e21c8be4d8bd559797b15cee3bddbb43d3e5010568861 aarch64 python3-jwcrypto-1.5.6-5.el10_2.noarch.rpm SHA-256: 4138ba5252d6c91c93187940d9dd01165d050955ac687849ae33ba8884458f1b Red Hat Enterprise Linux for ARM 64 - Extended Update Support 10.2 SRPM python-jwcrypto-1.5.6-5.el10_2.src.rpm SHA-256: 3441b687496b42495f8e21c8be4d8bd559797b15cee3bddbb43d3e5010568861 aarch64 python3-jwcrypto-1.5.6-5.el10_2.noarch.rpm SHA-256: 4138ba5252d6c91c93187940d9dd01165d050955ac687849ae33ba8884458f1b Red Hat Enterprise Linux for ARM 64 - 4 years of updates 10.2 SRPM python-jwcrypto-1.5.6-5.el10_2.src.rpm SHA-256: 3441b687496b42495f8e21c8be4d8bd559797b15cee3bddbb43d3e5010568861 aarch64 python3-jwcrypto-1.5.6-5.el10_2.noarch.rpm SHA-256: 4138ba5252d6c91c93187940d9dd01165d050955ac687849ae33ba8884458f1b Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 10.2 SRPM python-jwcrypto-1.5.6-5.el10_2.src.rpm SHA-256: 3441b687496b42495f8e21c8be4d8bd559797b15cee3bddbb43d3e5010568861 s390x python3-jwcrypto-1.5.6-5.el10_2.noarch.rpm SHA-256: 4138ba5252d6c91c93187940d9dd01165d050955ac687849ae33ba8884458f1b Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.2 SRPM python-jwcrypto-1.5.6-5.el10_2.src.rpm SHA-256: 3441b687496b42495f8e21c8be4d8bd559797b15cee3bddbb43d3e5010568861 ppc64le python3-jwcrypto-1.5.6-5.el10_2.noarch.rpm SHA-256: 4138ba5252d6c91c93187940d9dd01165d050955ac687849ae33ba8884458f1b Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.2 SRPM python-jwcrypto-1.5.6-5.el10_2.src.rpm SHA-256: 3441b687496b42495f8e21c8be4d8bd559797b15cee3bddbb43d3e5010568861 x86_64 python3-jwcrypto-1.5.6-5.el10_2.noarch.rpm SHA-256: 4138ba5252d6c91c93187940d9dd01165d050955ac687849ae33ba8884458f1b Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 10.2 SRPM python-jwcrypto-1.5.6-5.el10_2.src.rpm SHA-256: 3441b687496b42495f8e21c8be4d8bd559797b15cee3bddbb43d3e5010568861 x86_64 python3-jwcrypto-1.5.6-5.el10_2.noarch.rpm SHA-256: 4138ba5252d6c91c93187940d9dd01165d050955ac687849ae33ba8884458f1b Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 10.2 SRPM python-jwcrypto-1.5.6-5.el10_2.src.rpm SHA-256: 3441b687496b42495f8e21c8be4d8bd559797b15cee3bddbb43d3e5010568861 aarch64 python3-jwcrypto-1.5.6-5.el10_2.noarch.rpm SHA-256: 4138ba5252d6c91c93187940d9dd01165d050955ac687849ae33ba8884458f1b Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 10.2 SRPM python-jwcrypto-1.5.6-5.el10_2.src.rpm SHA-256: 3441b687496b42495f8e21c8be4d8bd559797b15cee3bddbb43d3e5010568861 ppc64le python3-jwcrypto-1.5.6-5.el10_2.noarch.rpm SHA-256: 4138ba5252d6c91c93187940d9dd01165d050955ac687849ae33ba8884458f1b Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 10.2 SRPM python-jwcrypto-1.5.6-5.el10_2.src.rpm SHA-256: 3441b687496b42495f8e21c8be4d8bd559797b15cee3bddbb43d3e5010568861 s390x python3-jwcrypto-1.5.6-5.el10_2.noarch.rpm SHA-256: 4138ba5252d6c91c93187940d9dd01165d050955ac687849ae33ba8884458f1b The Red Hat security contact is secalert@redhat.com . 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