Red Hat Security Advisory: python3.14 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): * cpython: wsgiref.headers.Headers allows header newline injection in Python (CVE-2026-0865) * cpython: CPython: Logging Bypass in Legacy .pyc File Handling (CVE-2026-2297) * cpython: Incomplete control character validation in http.cookies (CVE-2026-3644) * cpython: Stack overflow parsing XML with deeply nested DTD content models (CVE-2026-4224) * python: Python: Command-line option injection in webbrowser.open() via crafted URLs (CVE-2026-4519) * python: Python: HTTP header injection via CR/LF in proxy tunnel headers (CVE-2026-1502) * 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) * python: Python: Information disclosure and arbitrary code execution via remote debugging with a malicious process. (CVE-2026-5713) 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 Red Hat security advisory (RHSA-2026:19019) covers a set of nine vulnerabilities in python3.14, including CVE-2026-0865 (header newline injection in wsgiref.headers.Headers), CVE-2026-2297 (logging bypass in legacy .pyc file handling), CVE-2026-3644 (incomplete control character validation in http.cookies), CVE-2026-4224 (stack overflow parsing XML with deeply nested DTD content models), CVE-2026-4519 (command-line option injection in webbrowser.open()), CVE-2026-1502 (HTTP header injection via CR/LF in proxy tunnel headers), CVE-2026-6100 (use-after-free in decompression modules leading to arbitrary code execution or information disclosure), CVE-2026-4786 (arbitrary code execution via command injection in webbrowser.open() API), and CVE-2026-5713 (information disclosure and arbitrary code execution via remote debugging with a malicious process). These vulnerabilities affect multiple architectures and variants of Red Hat Enterprise Linux 10 and CodeReady Linux Builder. The advisory provides updated python3.14 packages to address these issues.
Potential Impact
The vulnerabilities collectively allow for various security impacts including header injection, logging bypass, stack overflow, command injection, arbitrary code execution, and information disclosure. These could enable attackers to execute arbitrary code, bypass security controls, or disclose sensitive information on affected systems running vulnerable python3.14 versions. The advisory rates the overall impact as Important (high severity).
Mitigation Recommendations
Red Hat has released updated python3.14 packages that fix all listed vulnerabilities. Users should apply these official updates as described in the Red Hat advisory (RHSA-2026:19019) and the referenced article https://access.redhat.com/articles/11258. No alternative mitigations or workarounds are specified. Applying the update is the recommended and effective remediation.
Red Hat Security Advisory: python3.14 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): * cpython: wsgiref.headers.Headers allows header newline injection in Python (CVE-2026-0865) * cpython: CPython: Logging Bypass in Legacy .pyc File Handling (CVE-2026-2297) * cpython: Incomplete control character validation in http.cookies (CVE-2026-3644) * cpython: Stack overflow parsing XML with deeply nested DTD content models (CVE-2026-4224) * python: Python: Command-line option injection in webbrowser.open() via crafted URLs (CVE-2026-4519) * python: Python: HTTP header injection via CR/LF in proxy tunnel headers (CVE-2026-1502) * 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) * python: Python: Information disclosure and arbitrary code execution via remote debugging with a malicious process. (CVE-2026-5713) 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
This Red Hat security advisory (RHSA-2026:19019) covers a set of nine vulnerabilities in python3.14, including CVE-2026-0865 (header newline injection in wsgiref.headers.Headers), CVE-2026-2297 (logging bypass in legacy .pyc file handling), CVE-2026-3644 (incomplete control character validation in http.cookies), CVE-2026-4224 (stack overflow parsing XML with deeply nested DTD content models), CVE-2026-4519 (command-line option injection in webbrowser.open()), CVE-2026-1502 (HTTP header injection via CR/LF in proxy tunnel headers), CVE-2026-6100 (use-after-free in decompression modules leading to arbitrary code execution or information disclosure), CVE-2026-4786 (arbitrary code execution via command injection in webbrowser.open() API), and CVE-2026-5713 (information disclosure and arbitrary code execution via remote debugging with a malicious process). These vulnerabilities affect multiple architectures and variants of Red Hat Enterprise Linux 10 and CodeReady Linux Builder. The advisory provides updated python3.14 packages to address these issues.
Potential Impact
The vulnerabilities collectively allow for various security impacts including header injection, logging bypass, stack overflow, command injection, arbitrary code execution, and information disclosure. These could enable attackers to execute arbitrary code, bypass security controls, or disclose sensitive information on affected systems running vulnerable python3.14 versions. The advisory rates the overall impact as Important (high severity).
Mitigation Recommendations
Red Hat has released updated python3.14 packages that fix all listed vulnerabilities. Users should apply these official updates as described in the Red Hat advisory (RHSA-2026:19019) and the referenced article https://access.redhat.com/articles/11258. No alternative mitigations or workarounds are specified. Applying the update is the recommended and effective remediation.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:19019
- Cve Count
- 9
- Additional Cves
- ["CVE-2026-1502","CVE-2026-2297","CVE-2026-3644","CVE-2026-4224","CVE-2026-4519","CVE-2026-4786","CVE-2026-5713","CVE-2026-6100"]
- Cvss Version
- null
Threat ID: 6a175eeee29bf47b50edd223
Added to database: 5/27/2026, 9:15:26 PM
Last enriched: 5/27/2026, 9:23:37 PM
Last updated: 5/29/2026, 7:02:59 PM
Views: 14
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