ESB-2026.4093 PUBLISHED CVSS 7.099999904632568 HIGH

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.4093 python3 security update 23 April 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: python3 Publisher: Red Hat Operating System: Red Hat Resolution: Patch/Upgrade CVE Names: CVE-2026-4519 Original Bulletin: https://access.redhat.com/errata/RHSA-2026:9745 Comment: CVSS (Max): 7.1 CVE-2026-4519 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L) CVSS Source: Red Hat Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L EPSS (Max): 0.0% (1st) CVE-2026-4519 2026-04-22 - --------------------------BEGIN INCLUDED TEXT-------------------- RHSA-2026:9745 - Security Advisory Issued: 2026-04-22 Updated: 2026-04-22 Synopsis Python3 security update Type/Severity Security Advisory: Important Topic An update for python3 is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support. 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 python: Python: Command-line option injection in webbrowser.open() via crafted URLs (CVE-2026-4519) 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 Server - Extended Life Cycle Support 7 x86_64 o Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 7 s390x o Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian 7 ppc64 o Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, little endian 7 ppc64le Fixes o BZ - 2449649 - CVE-2026-4519 python: Python: Command-line option injection in webbrowser.open() via crafted URLs CVEs o CVE-2026-4519 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
7.099999904632568
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L

Affected Products

VendorProductVersions
Red Hatpython3

Timeline

References

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