BIT-PYTHON-2026-6019 BaseCookie.js_output() does not neutralize embedded characters

http.cookies.Morsel.jsoutput returns an inline snippet and only escapes " for JavaScript string context. It does not neutralize the HTML parser-sensitive sequence inside the generated script element. Mitigation base64-encodes the cookie value to disallow escaping using cookie value...

python: Python: Cross-Site Scripting (XSS) vulnerability in http.cookies module

A flaw was found in Python's http.cookies module. The Morsel.jsoutput function, responsible for generating JavaScript output for cookies, does not properly neutralize the HTML sequence. This oversight could allow a remote attacker to inject malicious script into a web page, potentially leading to...

Medium: python3.13

Issue Overview: http.cookies.Morsel.jsoutput returns an inline snippet and only escapes " for JavaScript string context. It does not neutralize the HTML parser-sensitive sequence inside the generated script element. Mitigation base64-encodes the cookie value to disallow escaping using cookie valu...

Medium: python3.14

Issue Overview: The "tarfile" module would still apply normalization of AREGTYPE \x00 blocks to DIRTYPE, even while processing a multi-block member such as GNUTYPELONGNAME or GNUTYPELONGLINK. This could result in a crafted tar archive being misinterpreted by the tarfile module compared to other...

Amazon Linux 2023 : python3.12, python3.12-devel, python3.12-idle (ALAS2023-2026-1821)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1821 advisory. The import hook in CPython that handles legacy .pyc files SourcelessFileLoader is incorrectly handled in FileLoader a base class and so does not use io.opencode to read the .pyc files. sys.aud...

RockyLinux 9 : python3.12 (RLSA-2026:19177)

The remote RockyLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:19177 advisory. expat: libexpat in Expat allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing CVE-2025-59375...

Astra Linux – Vulnerability in Python 3.11

When using http.cookies.Morsel, user-controlled cookie values and parameters may allow the injection of HTTP headers into messages. The patch rejects all control characters within cookie names, values, and parameters...

cpython: Incomplete control character validation in http.cookies

A control character validation flaw has been discovered in the Python http.cookie module. The Morsel.update, |= operator, and unpickling paths were not patched to resolve CVE-2026-0672, allowing control characters to bypass input validation. Additionally, BaseCookie.jsoutput lacked the output...

cpython: Incomplete control character validation in http.cookies

A control character validation flaw has been discovered in the Python http.cookie module. The Morsel.update, |= operator, and unpickling paths were not patched to resolve CVE-2026-0672, allowing control characters to bypass input validation. Additionally, BaseCookie.jsoutput lacked the output...

cpython: Header injection in http.cookies.Morsel in Python

An injection flaw has been discovered in Python. When using http.cookies.Morsel, user-controlled cookie values and parameters can allow injecting HTTP headers into messages. Patch rejects all control characters within cookie names, values, and parameters...

cpython: Incomplete control character validation in http.cookies

A control character validation flaw has been discovered in the Python http.cookie module. The Morsel.update, |= operator, and unpickling paths were not patched to resolve CVE-2026-0672, allowing control characters to bypass input validation. Additionally, BaseCookie.jsoutput lacked the output...

cpython: Header injection in http.cookies.Morsel in Python

An injection flaw has been discovered in Python. When using http.cookies.Morsel, user-controlled cookie values and parameters can allow injecting HTTP headers into messages. Patch rejects all control characters within cookie names, values, and parameters...

cpython: Incomplete control character validation in http.cookies

A control character validation flaw has been discovered in the Python http.cookie module. The Morsel.update, |= operator, and unpickling paths were not patched to resolve CVE-2026-0672, allowing control characters to bypass input validation. Additionally, BaseCookie.jsoutput lacked the output...

RHEL 10 : python3.12 (RHSA-2026:19064)

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:19064 advisory. Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level...

[SECURITY] [DLA 4583-1] python3.9 security update

------------------------------------------------------------------------- Debian LTS Advisory DLA-4583-1 [email protected] https://www.debian.org/lts/security/ Arnaud Rebillout May 15, 2026 https://wiki.debian.org/LTS -...

OESA-2026-2270 python3 security update

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...

OESA-2026-2269 python3 security update

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...

CLSA-2026-1778129970 python3.11: Fix of 7 CVEs

CVE-2026-0672: reject control characters in http.cookies cookie names, values, and parameters to prevent header injection - CVE-2026-3644: reject control characters in Morsel.update, |= operator, and unpickling paths missed by CVE-2026-0672; add output validation to BaseCookie.jsoutput -...

ROS-20260505-73-0052

A vulnerability in the http.cookies.Morsel component of the Python programming language interpreter is related to the failure to take measures to neutralize CRLF sequences. Exploitation of the vulnerability may allow a remote attacker to affect the availability of protected information...

ROS-20260505-73-0053

A vulnerability in the http.cookies.Morsel component of the Python programming language interpreter is related to the failure to take measures to neutralize CRLF sequences. Exploitation of the vulnerability could allow a remote attacker to affect the availability of protected information...