ESB-2026.4093
PUBLISHED
CVSS 7.099999904632568 HIGH
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AUSCERT External Security Bulletin Redistribution
ESB-2026.4093
python3 security update
23 April 2026
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AUSCERT Security Bulletin Summary
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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
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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
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