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ALSA-2026:10950 — Important: python3.12 security update

Affected: AlmaLinux:8: python3.12, AlmaLinux:8: python3.12-debug, AlmaLinux:8: python3.12-devel, AlmaLinux:8: python3.12-idle, AlmaLinux:8: python3.12-libs, AlmaLinux:8: python3.12-rpm-macros, AlmaLinux:8: python3.12-test, AlmaLinux:8: python3.12-tkinter

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):

* expat: libexpat in Expat allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing (CVE-2025-59375) * python: Quadratic complexity in os.path.expandvars() with user-controlled template (CVE-2025-6075) * cpython: Out-of-memory when loading Plist (CVE-2025-13837) * cpython: Header injection via newlines in data URL mediatype in Python (CVE-2025-15282) * cpython: Header injection in http.cookies.Morsel in Python (CVE-2026-0672) * 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: 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)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgment…

bdu:2026-05133

BELL-CVE-2025-15282

Affected: Alpaquita:23: python3, Alpaquita:25: python3, Alpaquita:stream: python3, BellSoft Hardened Containers:23: python3, BellSoft Hardened Containers:25: python3, BellSoft Hardened Containers:stream: python3

BIT-libpython-2025-15282 — Header injection via newlines in data URL mediatype

Affected: Bitnami: libpython

User-controlled data URLs parsed by urllib.request.DataHandler allow injecting headers through newlines in the data URL mediatype.

certfr-2026-avi-0067 — De multiples vulnérabilités ont été découvertes dans CPython. Certaines d'entre elles permettent à un attaquant de prov…

certfr-2026-avi-0067

EUVD-2026-274033

fkie_cve-2025-15282

User-controlled data URLs parsed by urllib.request.DataHandler allow injecting headers through newlines in the data URL mediatype.

GHSA-6rv6-r2f2-gqrc

User-controlled data URLs parsed by urllib.request.DataHandler allow injecting headers through newlines in the data URL mediatype.

OESA-2026-1458 — python3 security update

Affected: openEuler:24.03-LTS: python3

Python combines remarkable power with very clear syntax. It has modules, classes, exceptions, very high level dynamic data types, and dynamic typing. There are interfaces to many system calls and libraries, as well as to various windowing systems. New built-in modules are easily written in C or C++ (or other languages, depending on the chosen implementation). Python is also usable as an extension language for applications written in other languages that need easy-to-use scripting or automation interfaces. Security Fix(es):

In CPython's email module, when folding a long comment containing exclusively unfoldable characters, the parentheses are not preserved. This could be exploited to inject headers into email messages in scenarios where email addresses are user-controlled and not sanitized.(CVE-2025-11468)

User-controlled data URLs parsed by urllib.request.DataHandler allow injecting headers through newlines in the data URL mediatype.(CVE-2025-15282)

openSUSE-SU-2026:10200-1 — python310-3.10.19-4.1 on GA media

python310-3.10.19-4.1 on GA media

RHSA-2026:21275 — Red Hat Security Advisory: Red Hat Update Infrastructure 5.1 security update

python: Quadratic complexity in os.path.expandvars() with user-controlled template cpython: Out-of-memory when loading Plist glib: GLib: Buffer underflow in GVariant parser leads to heap corruption glib: Integer Overflow in GLib GIO Attribute Escaping Causes Heap Buffer Overflow cpython: Header injection via newlines in data URL mediatype in Python firefox: thunderbird: expat: libexpat in Expat allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing cpython: Header injection in http.cookies.Morsel in Python cpython: wsgiref.headers.Headers allows header newline injection in Python python: Python: HTTP header injection via CR/LF in proxy tunnel headers p11-kit: NULL dereference via C_DeriveKey with specific NULL parameters cpython: CPython: Logging Bypass in Legacy .pyc File Handling cpython: Incomplete control character validation in http.cookies cpython: Stack overflow parsing XML with deeply nested DTD content models python: Python: Command-line option injection in webbrowser.open() via crafted URLs python: cpython: Python: Arbitrary code execution via command injection in webbrowser.open() API libcap: libcap: Privilege escalation via TOCTOU race condition in cap_set_file() python: Python: Arbitrary code execution or information disclosure via use-after-free in decompression modules systemd: systemd: Arbitrary code execution or Denial of Service via spurious IPC API call data openssl: openssl: Information Disclosure f…

SUSE-SU-2026:0612-1 — Security update for python36

Security update for python36

UBUNTU-CVE-2025-15282

Affected: Ubuntu:Pro:14.04:LTS: python2.7, Ubuntu:Pro:14.04:LTS: python3.4, Ubuntu:Pro:14.04:LTS: python3.5, Ubuntu:Pro:16.04:LTS: python2.7, Ubuntu:Pro:16.04:LTS: python3.5, Ubuntu:Pro:18.04:LTS: python2.7, Ubuntu:Pro:18.04:LTS: python3.6, Ubuntu:Pro:18.04:LTS: python3.7, Ubuntu:Pro:18.04:LTS: python3.8, Ubuntu:Pro:20.04:LTS: python3.8 and 7 more

User-controlled data URLs parsed by urllib.request.DataHandler allow injecting headers through newlines in the data URL mediatype.

WID-SEC-W-2026-0209 — Cpython: Mehrere Schwachstellen

Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Cpython ausnutzen, um Dateien zu manipulieren oder beliebigen Code auszuführen.