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 for Red Hat Enterprise Linux 9.0. CVE-2026-6100 is a use-after-free vulnerability in decompression modules that could allow arbitrary code execution or information disclosure. CVE-2026-4786 is a command injection vulnerability in the webbrowser.open() API that could allow arbitrary code execution. Red Hat has released updated python3.9 packages that address these issues. The advisory references Red Hat Bugzilla entries 2457932 and 2458049 for the respective CVEs. The update applies to Red Hat Enterprise Linux 9.0 on multiple architectures including aarch64, x86_64, ppc64le, and s390x. No CVSS scores are provided in the advisory, but the impact is rated as Important by Red Hat.
Potential Impact
Successful exploitation of these vulnerabilities could allow an attacker to execute arbitrary code or cause information disclosure on affected systems running vulnerable versions of python3.9. The use-after-free in decompression modules (CVE-2026-6100) may lead to memory corruption, while the command injection in webbrowser.open() (CVE-2026-4786) could allow execution of arbitrary commands. These impacts pose a significant security risk to affected Red Hat Enterprise Linux 9.0 systems.
Mitigation Recommendations
Red Hat has released updated python3.9 packages for Red Hat Enterprise Linux 9.0 that fix these vulnerabilities. Users should apply the security update as described in the Red Hat advisory RHSA-2026:19571 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated by the vendor. Patch status is confirmed as fixed in the updated packages.
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 for Red Hat Enterprise Linux 9.0. CVE-2026-6100 is a use-after-free vulnerability in decompression modules that could allow arbitrary code execution or information disclosure. CVE-2026-4786 is a command injection vulnerability in the webbrowser.open() API that could allow arbitrary code execution. Red Hat has released updated python3.9 packages that address these issues. The advisory references Red Hat Bugzilla entries 2457932 and 2458049 for the respective CVEs. The update applies to Red Hat Enterprise Linux 9.0 on multiple architectures including aarch64, x86_64, ppc64le, and s390x. No CVSS scores are provided in the advisory, but the impact is rated as Important by Red Hat.
Potential Impact
Successful exploitation of these vulnerabilities could allow an attacker to execute arbitrary code or cause information disclosure on affected systems running vulnerable versions of python3.9. The use-after-free in decompression modules (CVE-2026-6100) may lead to memory corruption, while the command injection in webbrowser.open() (CVE-2026-4786) could allow execution of arbitrary commands. These impacts pose a significant security risk to affected Red Hat Enterprise Linux 9.0 systems.
Mitigation Recommendations
Red Hat has released updated python3.9 packages for Red Hat Enterprise Linux 9.0 that fix these vulnerabilities. Users should apply the security update as described in the Red Hat advisory RHSA-2026:19571 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated by the vendor. Patch status is confirmed as fixed in the updated packages.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:19571
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-6100"]
- Cvss Version
- null
Threat ID: 6a175eeee29bf47b50edca1f
Added to database: 05/27/2026, 21:15:26 UTC
Last enriched: 07/03/2026, 00:52:22 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 34
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