Red Hat Security Advisory: python3.11 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
Red Hat Product Security issued an advisory (RHSA-2026:4473) for python3.11 on Red Hat Enterprise Linux 8, addressing four vulnerabilities: CVE-2026-0865 (header newline injection in wsgiref.headers.Headers), CVE-2025-15366 (IMAP command injection), CVE-2025-15367 (POP3 command injection), and CVE-2026-1299 (email header injection due to unquoted newlines). These vulnerabilities involve injection flaws in Python modules handling email and network protocols. The advisory includes updated python3.11 packages that fix these issues. No CVSS scores are provided in the advisory, but Red Hat rates the overall impact as moderate.
Potential Impact
The vulnerabilities allow injection attacks via crafted inputs to Python modules handling headers and commands in IMAP and POP3 protocols, potentially leading to command injection or header injection. This could affect applications or services using the vulnerable Python components on Red Hat Enterprise Linux 8 systems. No known exploits in the wild have been reported at the time of the advisory.
Mitigation Recommendations
Red Hat has released updated python3.11 packages for Red Hat Enterprise Linux 8 that address these vulnerabilities. Users should apply the security update as described in the advisory (https://access.redhat.com/articles/11258) to remediate the issues. No additional mitigation steps are indicated by the vendor advisory.
Red Hat Security Advisory: python3.11 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
Red Hat Product Security issued an advisory (RHSA-2026:4473) for python3.11 on Red Hat Enterprise Linux 8, addressing four vulnerabilities: CVE-2026-0865 (header newline injection in wsgiref.headers.Headers), CVE-2025-15366 (IMAP command injection), CVE-2025-15367 (POP3 command injection), and CVE-2026-1299 (email header injection due to unquoted newlines). These vulnerabilities involve injection flaws in Python modules handling email and network protocols. The advisory includes updated python3.11 packages that fix these issues. No CVSS scores are provided in the advisory, but Red Hat rates the overall impact as moderate.
Potential Impact
The vulnerabilities allow injection attacks via crafted inputs to Python modules handling headers and commands in IMAP and POP3 protocols, potentially leading to command injection or header injection. This could affect applications or services using the vulnerable Python components on Red Hat Enterprise Linux 8 systems. No known exploits in the wild have been reported at the time of the advisory.
Mitigation Recommendations
Red Hat has released updated python3.11 packages for Red Hat Enterprise Linux 8 that address these vulnerabilities. Users should apply the security update as described in the advisory (https://access.redhat.com/articles/11258) to remediate the issues. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:4473
- Cve Count
- 4
- Additional Cves
- ["CVE-2025-15367","CVE-2026-0865","CVE-2026-1299"]
- Cvss Version
- null
Threat ID: 6a175eeee29bf47b50edc5e7
Added to database: 05/27/2026, 21:15:26 UTC
Last enriched: 07/03/2026, 00:30:29 UTC
Last updated: 07/31/2026, 19:22:53 UTC
Views: 83
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