CVE-2026-9679

undici vulnerability CVE-2026-9679 affects the cookie parsing paths (parseSetCookie, parseCookie, getSetCookies). The cookie parser percent-decodes values (via qsUnescape), turning sequences like %0D%0A, %00, %3B, and %3D into literal bytes. RFC 6265 §5.4 does not require decoding and browsers do...

EulerOS Virtualization 2.10.1 : python3 (EulerOS-SA-2026-2033)

According to the versions of the python3 packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : If the value passed to os.path.expandvars is user-controlled a performance degradation is possible when expanding environment...

EulerOS Virtualization 2.10.0 : python3 (EulerOS-SA-2026-2060)

According to the versions of the python3 packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : If the value passed to os.path.expandvars is user-controlled a performance degradation is possible when expanding environment...

Astra Linux - уязвимость в firefox, thunderbird

Set-Cookie response headers were being honored incorrectly in multipart HTTP responses. If an attacker could control the Content-Type response header, as well as part of the response body, they could inject Set-Cookie headers that would be honored by the browser. This vulnerability affects Firefo...

Debian dla-4583 : idle-python3.9 - security update

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4583 advisory. - ------------------------------------------------------------------------- Debian LTS Advisory DLA-4583-1 [email protected]...

CVE-2026-42874 Microdot: HTTP response splitting in Response.set_cookie()

Microdot is a minimalistic Python web framework. Prior to 2.6.1, the Response.setcookie method does not sanitize its string arguments, and in particular will not detect the presence of the \r\n sequence in them. This can be a potential source of header injection attacks. For a header injection...

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 -...

Amazon Linux 2023 : python3.14, python3.14-devel, python3.14-freethreading (ALAS2023-2026-1617)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1617 advisory. 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, a...

USN-8018-3: Python 2.7 vulnerabilities

USN-8018-1 fixed CVE-2025-12084, CVE-2025-15282, CVE-2026-0672, CVE-2026-0865 for python3. This update provides the corresponding updates for python2.7. Original advisory details: Denis Ledoux discovered that Python incorrectly parsed email message headers. An attacker could possibly use this iss...

PT-2026-26175

Summary ewe's chunked transfer encoding trailer handling merges declared trailer fields into req.headers after body parsing, but the denylist only blocks 9 header names. Security-sensitive headers like authorization, cookie, and x-forwarded-for can be injected or overwritten by a malicious client...

Medium: python3

Issue Overview: When folding a long comment in an email header containing exclusively unfoldable characters, the parenthesis would not be preserved. This could be used for injecting headers into email messages where addresses are user-controlled and not sanitized. CVE-2025-11468 User-controlled...

OESA-2026-1462 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...

Security update for python311

This update for python311 fixes the following issues: CVE-2025-11468: header injection when folding a long comment in an email header containing exclusively unfoldable characters bsc1257029. CVE-2025-12781: inadequate parameter check can cause data integrity issues bsc1257108. CVE-2025-15282:...

SUSE-SU-2026:0590-1 Security update for python

This update for python fixes the following issues: - CVE-2026-0672: Fixed a HTTP header injection via user-controlled cookie values and parameters when using http.cookies.Morsel. bsc1257031 - CVE-2026-0865: Fixed a bug where a user-controlled header containing newlines can allow injecting HTTP...

Amazon Linux 2023 : python3.13, python3.13-devel, python3.13-freethreading (ALAS2023-2026-1437)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1437 advisory. When folding a long comment in an email header containing exclusively unfoldable characters, the parenthesis would not be preserved. This could be used for injecting headers into email message...

Linux Distros Unpatched Vulnerability : CVE-2026-0672

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - When using http.cookies.Morsel, user-controlled cookie values and parameters can allow injecting HTTP headers into messages. Patch rejects all control character...

SUSE CVE-2026-0672

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...

CVE-2026-0672

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...

AZL-75044 CVE-2026-0672 affecting package python3 for versions less than 3.9.19-18

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...

Set-Cookie response headers were being incorrectly honored in multipart HTTP responses. If an attacker could control the Content-Type response header, as well as control part of the response body, they could inject Set-Cookie response headers that would have been honored by the browser. This vulnerability affects Firefox < 123, Firefox ESR < 115.8, and Thunderbird < 115.8.

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