Red Hat Security Advisory: python3.9 security update
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): * python: Python: Arbitrary code execution or information disclosure via use-after-free in decompression modules (CVE-2026-6100) * 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.
AI Analysis
Technical Summary
This advisory covers two security vulnerabilities in python3.9 as packaged by Red Hat for RHEL 9.6 EUS. CVE-2026-6100 is a use-after-free vulnerability in decompression modules that can lead to arbitrary code execution or information disclosure. CVE-2026-4786 is a command injection vulnerability in the webbrowser.open() API that allows arbitrary code execution. Red Hat has released updated python3.9 packages to address these issues. The advisory does not provide CVSS scores but rates the impact as Important.
Potential Impact
Successful exploitation of CVE-2026-6100 could allow an attacker to execute arbitrary code or disclose sensitive information due to a use-after-free flaw in decompression modules. CVE-2026-4786 could allow arbitrary code execution via command injection in the webbrowser.open() API. Both vulnerabilities pose a high risk to affected systems running vulnerable python3.9 versions on Red Hat Enterprise Linux 9.6 EUS.
Mitigation Recommendations
Red Hat has released updated python3.9 packages for Red Hat Enterprise Linux 9.6 Extended Update Support that fix these vulnerabilities. Users should apply the security update as described in the Red Hat advisory RHSA-2026:19576 and the referenced article https://access.redhat.com/articles/11258. No other mitigation or workaround is indicated in the advisory.
Red Hat Security Advisory: python3.9 security update
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): * python: Python: Arbitrary code execution or information disclosure via use-after-free in decompression modules (CVE-2026-6100) * 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.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers two security vulnerabilities in python3.9 as packaged by Red Hat for RHEL 9.6 EUS. CVE-2026-6100 is a use-after-free vulnerability in decompression modules that can lead to arbitrary code execution or information disclosure. CVE-2026-4786 is a command injection vulnerability in the webbrowser.open() API that allows arbitrary code execution. Red Hat has released updated python3.9 packages to address these issues. The advisory does not provide CVSS scores but rates the impact as Important.
Potential Impact
Successful exploitation of CVE-2026-6100 could allow an attacker to execute arbitrary code or disclose sensitive information due to a use-after-free flaw in decompression modules. CVE-2026-4786 could allow arbitrary code execution via command injection in the webbrowser.open() API. Both vulnerabilities pose a high risk to affected systems running vulnerable python3.9 versions on Red Hat Enterprise Linux 9.6 EUS.
Mitigation Recommendations
Red Hat has released updated python3.9 packages for Red Hat Enterprise Linux 9.6 Extended Update Support that fix these vulnerabilities. Users should apply the security update as described in the Red Hat advisory RHSA-2026:19576 and the referenced article https://access.redhat.com/articles/11258. No other mitigation or workaround is indicated in the advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:19576
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-6100"]
- Cvss Version
- null
Threat ID: 6a175eeee29bf47b50edca18
Added to database: 05/27/2026, 21:15:26 UTC
Last enriched: 07/03/2026, 00:52:16 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 39
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