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
The advisory covers two security flaws in python3.9: CVE-2026-6100 is a use-after-free vulnerability in decompression modules that may allow arbitrary code execution or information disclosure. CVE-2026-4786 is a command injection vulnerability in the webbrowser.open() API that could lead to arbitrary code execution. These vulnerabilities affect multiple Red Hat Enterprise Linux 9.6 Extended Update Support variants and related builder products. Red Hat has issued updated python3.9 packages to fix these vulnerabilities as detailed in advisory RHSA-2026:19576.
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 enable arbitrary code execution through command injection in the webbrowser.open() API. Both vulnerabilities pose a high security risk to affected systems running vulnerable python3.9 versions. No known exploits in the wild have been reported, but the potential impact is significant if exploited.
Mitigation Recommendations
Red Hat has released updated python3.9 packages that address these vulnerabilities. Users of affected Red Hat Enterprise Linux 9.6 Extended Update Support and related products should apply the provided security update promptly following Red Hat's official guidance at https://access.redhat.com/articles/11258. Applying this update mitigates the vulnerabilities. There is no indication that additional mitigation steps are required beyond applying the official patch.
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The advisory covers two security flaws in python3.9: CVE-2026-6100 is a use-after-free vulnerability in decompression modules that may allow arbitrary code execution or information disclosure. CVE-2026-4786 is a command injection vulnerability in the webbrowser.open() API that could lead to arbitrary code execution. These vulnerabilities affect multiple Red Hat Enterprise Linux 9.6 Extended Update Support variants and related builder products. Red Hat has issued updated python3.9 packages to fix these vulnerabilities as detailed in advisory RHSA-2026:19576.
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 enable arbitrary code execution through command injection in the webbrowser.open() API. Both vulnerabilities pose a high security risk to affected systems running vulnerable python3.9 versions. No known exploits in the wild have been reported, but the potential impact is significant if exploited.
Mitigation Recommendations
Red Hat has released updated python3.9 packages that address these vulnerabilities. Users of affected Red Hat Enterprise Linux 9.6 Extended Update Support and related products should apply the provided security update promptly following Red Hat's official guidance at https://access.redhat.com/articles/11258. Applying this update mitigates the vulnerabilities. There is no indication that additional mitigation steps are required beyond applying the official patch.
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: 5/27/2026, 9:15:26 PM
Last enriched: 5/27/2026, 9:21:56 PM
Last updated: 5/29/2026, 4:43:03 PM
Views: 8
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