Red Hat Security Advisory: python3.12 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: IMAP command injection in user-controlled commands (CVE-2025-15366) * cpython: POP3 command injection in user-controlled commands (CVE-2025-15367) * cpython: email header injection due to unquoted newlines (CVE-2026-1299) 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 four distinct vulnerabilities in the Python 3.12 implementation on Red Hat Enterprise Linux 10. The issues include: CVE-2026-0865, a header newline injection vulnerability in wsgiref.headers.Headers; CVE-2025-15366 and CVE-2025-15367, command injection vulnerabilities in IMAP and POP3 user-controlled commands respectively; and CVE-2026-1299, an email header injection vulnerability caused by unquoted newlines. These vulnerabilities could allow injection attacks via crafted input in affected Python modules. Red Hat has released updated python3.12 packages to remediate these vulnerabilities.
Potential Impact
The vulnerabilities allow injection attacks in Python modules handling headers and user commands for IMAP and POP3 protocols. This could lead to potential manipulation of headers or commands, which may affect applications relying on these Python components. The overall security impact is rated moderate by Red Hat Product Security. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated python3.12 packages for Red Hat Enterprise Linux 10 and related builder products that fix these vulnerabilities. Users should apply the security update as detailed in Red Hat advisory RHSA-2026:4713 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official update.
Red Hat Security Advisory: python3.12 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: IMAP command injection in user-controlled commands (CVE-2025-15366) * cpython: POP3 command injection in user-controlled commands (CVE-2025-15367) * cpython: email header injection due to unquoted newlines (CVE-2026-1299) 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 four distinct vulnerabilities in the Python 3.12 implementation on Red Hat Enterprise Linux 10. The issues include: CVE-2026-0865, a header newline injection vulnerability in wsgiref.headers.Headers; CVE-2025-15366 and CVE-2025-15367, command injection vulnerabilities in IMAP and POP3 user-controlled commands respectively; and CVE-2026-1299, an email header injection vulnerability caused by unquoted newlines. These vulnerabilities could allow injection attacks via crafted input in affected Python modules. Red Hat has released updated python3.12 packages to remediate these vulnerabilities.
Potential Impact
The vulnerabilities allow injection attacks in Python modules handling headers and user commands for IMAP and POP3 protocols. This could lead to potential manipulation of headers or commands, which may affect applications relying on these Python components. The overall security impact is rated moderate by Red Hat Product Security. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated python3.12 packages for Red Hat Enterprise Linux 10 and related builder products that fix these vulnerabilities. Users should apply the security update as detailed in Red Hat advisory RHSA-2026:4713 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated 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-2026:4713
- Cve Count
- 4
- Additional Cves
- ["CVE-2025-15367","CVE-2026-0865","CVE-2026-1299"]
- Cvss Version
- null
Threat ID: 6a175eeee29bf47b50edc5de
Added to database: 05/27/2026, 21:15:26 UTC
Last enriched: 07/03/2026, 00:30:10 UTC
Last updated: 07/31/2026, 19:22:53 UTC
Views: 71
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