An Important update for python3.14-urllib3 addresses two vulnerabilities: CVE-2026-44432, a Denial of Service via excessive HTTP response decompression, and CVE-2026-44431, an information disclosure via cross-origin redirects forwarding sensitive headers. This security update applies to Red Hat Enterprise Linux 10 across all supported architectures, and affected systems should be patched by applying the errata through the standard Red Hat update channels.
Red Hat Product Errata RHSA-2026:27929 - Security Advisory Issued: 2026-06-22 Updated: 2026-06-22 RHSA-2026:27929 - Security Advisory Overview Updated Packages Synopsis Important: python3.14-urllib3 security update Type/Severity Security Advisory: Important Red Hat Lightspeed patch analysis Identify and remediate systems affected by this advisory. View affected systems Topic An update for python3.14-urllib3 is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important. 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): urllib3: urllib3: Denial of Service due to excessive HTTP response decompression (CVE-2026-44432) urllib3: urllib3: Information disclosure via cross-origin redirects forwarding sensitive headers (CVE-2026-44431) 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 - 2477154 - CVE-2026-44432 urllib3: urllib3: Denial of Service due to excessive HTTP response decompression BZ - 2477167 - CVE-2026-44431 urllib3: urllib3: Information disclosure via cross-origin redirects forwarding sensitive headers RHEL-184903 - CVE-2026-44431: python3.14-urllib3: Sensitive headers forwarded across origins in proxied low-level redirects [rhel-10.2.z] RHEL-185128 - CVE-2026-44432 - python3.14-urllib3: Decompression-bomb safeguards bypassed in parts of the streaming API [rhel-10.2.z] CVEs CVE-2026-44431 CVE-2026-44432 References https://access.redhat.com/security/updates/classification/#important Note: More recent versions of these packages may be available. 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Red Hat Enterprise Linux for x86_64 10 SRPM python3.14-urllib3-2.6.3-2.el10_2.src.rpm SHA-256: 71026d2139a2d46ba8a799bcd3ca6f2964374e7faa2a28e3993e7ee24589a6f1 x86_64 python3.14-urllib3-2.6.3-2.el10_2.noarch.rpm SHA-256: c7a437340f618e85d3e0036894bbe4a752422bfc025e77de7b19bcf0b29e6370 Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.2 SRPM python3.14-urllib3-2.6.3-2.el10_2.src.rpm SHA-256: 71026d2139a2d46ba8a799bcd3ca6f2964374e7faa2a28e3993e7ee24589a6f1 x86_64 python3.14-urllib3-2.6.3-2.el10_2.noarch.rpm SHA-256: c7a437340f618e85d3e0036894bbe4a752422bfc025e77de7b19bcf0b29e6370 Red Hat Enterprise Linux for IBM z Systems 10 SRPM python3.14-urllib3-2.6.3-2.el10_2.src.rpm SHA-256: 71026d2139a2d46ba8a799bcd3ca6f2964374e7faa2a28e3993e7ee24589a6f1 s390x python3.14-urllib3-2.6.3-2.el10_2.noarch.rpm SHA-256: c7a437340f618e85d3e0036894bbe4a752422bfc025e77de7b19bcf0b29e6370 Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 10.2 SRPM python3.14-urllib3-2.6.3-2.el10_2.src.rpm SHA-256: 71026d2139a2d46ba8a799bcd3ca6f2964374e7faa2a28e3993e7ee24589a6f1 s390x python3.14-urllib3-2.6.3-2.el10_2.noarch.rpm SHA-256: c7a437340f618e85d3e0036894bbe4a752422bfc025e77de7b19bcf0b29e6370 Red Hat Enterprise Linux for Power, little endian 10 SRPM python3.14-urllib3-2.6.3-2.el10_2.src.rpm SHA-256: 71026d2139a2d46ba8a799bcd3ca6f2964374e7faa2a28e3993e7ee24589a6f1 ppc64le python3.14-urllib3-2.6.3-2.el10_2.noarch.rpm SHA-256: c7a437340f618e85d3e0036894bbe4a752422bfc025e77de7b19bcf0b29e6370 Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.2 SRPM python3.14-urllib3-2.6.3-2.el10_2.src.rpm SHA-256: 71026d2139a2d46ba8a799bcd3ca6f2964374e7faa2a28e3993e7ee24589a6f1 ppc64le python3.14-urllib3-2.6.3-2.el10_2.noarch.rpm SHA-256: c7a437340f618e85d3e0036894bbe4a752422bfc025e77de7b19bcf0b29e6370 Red Hat Enterprise Linux for ARM 64 10 SRPM python3.14-urllib3-2.6.3-2.el10_2.src.rpm SHA-256: 71026d2139a2d46ba8a799bcd3ca6f2964374e7faa2a28e3993e7ee24589a6f1 aarch64 python3.14-urllib3-2.6.3-2.el10_2.noarch.rpm SHA-256: c7a437340f618e85d3e0036894bbe4a752422bfc025e77de7b19bcf0b29e6370 Red Hat Enterprise Linux for ARM 64 - Extended Update Support 10.2 SRPM python3.14-urllib3-2.6.3-2.el10_2.src.rpm SHA-256: 71026d2139a2d46ba8a799bcd3ca6f2964374e7faa2a28e3993e7ee24589a6f1 aarch64 python3.14-urllib3-2.6.3-2.el10_2.noarch.rpm SHA-256: c7a437340f618e85d3e0036894bbe4a752422bfc025e77de7b19bcf0b29e6370 Red Hat Enterprise Linux for ARM 64 - 4 years of updates 10.2 SRPM python3.14-urllib3-2.6.3-2.el10_2.src.rpm SHA-256: 71026d2139a2d46ba8a799bcd3ca6f2964374e7faa2a28e3993e7ee24589a6f1 aarch64 python3.14-urllib3-2.6.3-2.el10_2.noarch.rpm SHA-256: c7a437340f618e85d3e0036894bbe4a752422bfc025e77de7b19bcf0b29e6370 Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 10.2 SRPM python3.14-urllib3-2.6.3-2.el10_2.src.rpm SHA-256: 71026d2139a2d46ba8a799bcd3ca6f2964374e7faa2a28e3993e7ee24589a6f1 s390x python3.14-urllib3-2.6.3-2.el10_2.noarch.rpm SHA-256: c7a437340f618e85d3e0036894bbe4a752422bfc025e77de7b19bcf0b29e6370 Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.2 SRPM python3.14-urllib3-2.6.3-2.el10_2.src.rpm SHA-256: 71026d2139a2d46ba8a799bcd3ca6f2964374e7faa2a28e3993e7ee24589a6f1 ppc64le python3.14-urllib3-2.6.3-2.el10_2.noarch.rpm SHA-256: c7a437340f618e85d3e0036894bbe4a752422bfc025e77de7b19bcf0b29e6370 Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.2 SRPM python3.14-urllib3-2.6.3-2.el10_2.src.rpm SHA-256: 71026d2139a2d46ba8a799bcd3ca6f2964374e7faa2a28e3993e7ee24589a6f1 x86_64 python3.14-urllib3-2.6.3-2.el10_2.noarch.rpm SHA-256: c7a437340f618e85d3e0036894bbe4a752422bfc025e77de7b19bcf0b29e6370 Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 10.2 SRPM python3.14-urllib3-2.6.3-2.el10_2.src.rpm SHA-256: 71026d2139a2d46ba8a799bcd3ca6f2964374e7faa2a28e3993e7ee24589a6f1 x86_64 python3.14-urllib3-2.6.3-2.el10_2.noarch.rpm SHA-256: c7a437340f618e85d3e0036894bbe4a752422bfc025e77de7b19bcf0b29e6370 Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 10.2 SRPM python3.14-urllib3-2.6.3-2.el10_2.src.rpm SHA-256: 71026d2139a2d46ba8a799bcd3ca6f2964374e7faa2a28e3993e7ee24589a6f1 aarch64 python3.14-urllib3-2.6.3-2.el10_2.noarch.rpm SHA-256: c7a437340f618e85d3e0036894bbe4a752422bfc025e77de7b19bcf0b29e6370 Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 10.2 SRPM python3.14-urllib3-2.6.3-2.el10_2.src.rpm SHA-256: 71026d2139a2d46ba8a799bcd3ca6f2964374e7faa2a28e3993e7ee24589a6f1 ppc64le python3.14-urllib3-2.6.3-2.el10_2.noarch.rpm SHA-256: c7a437340f618e85d3e0036894bbe4a752422bfc025e77de7b19bcf0b29e6370 Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 10.2 SRPM python3.14-urllib3-2.6.3-2.el10_2.src.rpm SHA-256: 71026d2139a2d46ba8a799bcd3ca6f2964374e7faa2a28e3993e7ee24589a6f1 s390x python3.14-urllib3-2.6.3-2.el10_2.noarch.rpm SHA-256: c7a437340f618e85d3e0036894bbe4a752422bfc025e77de7b19bcf0b29e6370 The Red Hat security contact is secalert@redhat.com . More contact details at https://access.redhat.com/security/team/contact/ .