ESB-2026.4316 — Vulnetix

ESB-2026.4316 PUBLISHED CVSS 8.100000381469727 HIGH

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.4316 python3.12 security update 28 April 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: python3.12 Publisher: Red Hat Operating System: Red Hat Resolution: Patch/Upgrade CVE Names: CVE-2026-3644 CVE-2026-4224 CVE-2026-4786 CVE-2026-1502 CVE-2025-13837 CVE-2026-2297 CVE-2025-6075 CVE-2025-59375 CVE-2025-15282 CVE-2026-6100 CVE-2026-0672 Original Bulletin: https://access.redhat.com/errata/RHSA-2026:10950 Comment: CVSS (Max): 8.1 CVE-2026-6100 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H) CVSS Source: Red Hat Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H EPSS (Max): 0.2% (36th) CVE-2026-0672 2026-04-27 - --------------------------BEGIN INCLUDED TEXT-------------------- RHSA-2026:10950 - Security Advisory Issued: 2026-04-27 Updated: 2026-04-27 Synopsis Python3.12 security update Type/Severity Security Advisory: Important Topic An update for python3.12 is now available for Red Hat Enterprise Linux 8. 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): o expat: libexpat in Expat allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing (CVE-2025-59375) o python: Quadratic complexity in os.path.expandvars() with user-controlled template (CVE-2025-6075) o cpython: Out-of-memory when loading Plist (CVE-2025-13837) o cpython: Header injection via newlines in data URL mediatype in Python (CVE-2025-15282) o cpython: Header injection in http.cookies.Morsel in Python (CVE-2026-0672) o cpython: CPython: Logging Bypass in Legacy .pyc File Handling (CVE-2026-2297) o cpython: Incomplete control character validation in http.cookies (CVE-2026-3644) o cpython: Stack overflow parsing XML with deeply nested DTD content models (CVE-2026-4224) o python: Python: HTTP header injection via CR/LF in proxy tunnel headers (CVE-2026-1502) o python: Python: Arbitrary code execution or information disclosure via use-after-free in decompression modules (CVE-2026-6100) o python: cpython: Python: Arbitrary code execution via command injection in webbrowser.open() API (CVE-2026-4786) 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 o Red Hat Enterprise Linux for x86_64 8 x86_64 o Red Hat Enterprise Linux for IBM z Systems 8 s390x o Red Hat Enterprise Linux for Power, little endian 8 ppc64le o Red Hat Enterprise Linux for ARM 64 8 aarch64 o Red Hat CodeReady Linux Builder for x86_64 8 x86_64 o Red Hat CodeReady Linux Builder for Power, little endian 8 ppc64le o Red Hat CodeReady Linux Builder for ARM 64 8 aarch64 o Red Hat CodeReady Linux Builder for IBM z Systems 8 s390x o Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 8.10 x86_64 o Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 8.10 aarch64 o Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 8.10 ppc64le o Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 8.10 s390x Fixes o BZ - 2395108 - CVE-2025-59375 firefox: thunderbird: expat: libexpat in Expat allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing o BZ - 2408891 - CVE-2025-6075 python: Quadratic complexity in os.path.expandvars() with user-controlled template o BZ - 2418084 - CVE-2025-13837 cpython: Out-of-memory when loading Plist o BZ - 2431366 - CVE-2025-15282 cpython: Header injection via newlines in data URL mediatype in Python o BZ - 2431374 - CVE-2026-0672 cpython: Header injection in http.cookies.Morsel in Python o BZ - 2444691 - CVE-2026-2297 cpython: CPython: Logging Bypass in Legacy .pyc File Handling o BZ - 2448168 - CVE-2026-3644 cpython: Incomplete control character validation in http.cookies o BZ - 2448181 - CVE-2026-4224 cpython: Stack overflow parsing XML with deeply nested DTD content models o BZ - 2457409 - CVE-2026-1502 python: Python: HTTP header injection via CR/ LF in proxy tunnel headers o BZ - 2457932 - CVE-2026-6100 python: Python: Arbitrary code execution or information disclosure via use-after-free in decompression modules o BZ - 2458049 - CVE-2026-4786 python: cpython: Python: Arbitrary code execution via command injection in webbrowser.open() API CVEs o CVE-2025-6075 o CVE-2025-13837 o CVE-2025-15282 o CVE-2025-59375 o CVE-2026-0672 o CVE-2026-1502 o CVE-2026-2297 o CVE-2026-3644 o CVE-2026-4224 o CVE-2026-4786 o CVE-2026-6100 References o https://access.redhat.com/security/updates/classification/#important - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AUSCERT's members. As AUSCERT did not write the document quoted above, AUSCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AUSCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://portal.auscert.org.au/bulletins/ =========================================================================== AUSCERT The University of Queensland, Brisbane QLD 4072 Australia e: auscert@auscert.org.au t: +61 (0)7 3365 4417 Allies in Cyber Security ===========================================================================

Risk Scores

CVSS v3.1

8.100000381469727

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Products

Vendor	Product	Versions
Red Hat	python3.12

Timeline

Apr 28, 2026 CVE Published
Apr 28, 2026 Distribution Patch

References

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