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 packages for Red Hat Enterprise Linux 9. CVE-2026-6100 is a use-after-free vulnerability in decompression modules that can result in 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 references Red Hat Bugzilla entries BZ-2457932 and BZ-2458049 for the respective CVEs and provides package updates for various architectures and variants of Red Hat Enterprise Linux 9.
Potential Impact
Successful exploitation of CVE-2026-6100 may allow an attacker to execute arbitrary code or disclose sensitive information due to a use-after-free flaw in decompression modules. Exploitation of CVE-2026-4786 could enable arbitrary code execution via command injection through the webbrowser.open() API. Both vulnerabilities pose a high security risk as they can lead to full compromise of affected systems running vulnerable python3.9 versions.
Mitigation Recommendations
Red Hat has released updated python3.9 packages for Red Hat Enterprise Linux 9 that address these vulnerabilities. Users should apply the security update as described in the Red Hat advisory RHSA-2026:10949 and the referenced article https://access.redhat.com/articles/11258 to remediate these issues. Patch status is confirmed as available. No additional mitigations are specified beyond applying the official update.
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 packages for Red Hat Enterprise Linux 9. CVE-2026-6100 is a use-after-free vulnerability in decompression modules that can result in 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 references Red Hat Bugzilla entries BZ-2457932 and BZ-2458049 for the respective CVEs and provides package updates for various architectures and variants of Red Hat Enterprise Linux 9.
Potential Impact
Successful exploitation of CVE-2026-6100 may allow an attacker to execute arbitrary code or disclose sensitive information due to a use-after-free flaw in decompression modules. Exploitation of CVE-2026-4786 could enable arbitrary code execution via command injection through the webbrowser.open() API. Both vulnerabilities pose a high security risk as they can lead to full compromise of affected systems running vulnerable python3.9 versions.
Mitigation Recommendations
Red Hat has released updated python3.9 packages for Red Hat Enterprise Linux 9 that address these vulnerabilities. Users should apply the security update as described in the Red Hat advisory RHSA-2026:10949 and the referenced article https://access.redhat.com/articles/11258 to remediate these issues. Patch status is confirmed as available. No additional mitigations are specified beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:10949
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-6100"]
- Cvss Version
- null
Threat ID: 6a175eefe29bf47b50edd962
Added to database: 05/27/2026, 21:15:27 UTC
Last enriched: 07/03/2026, 00:53:35 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 93
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