CVE-2026-27205

Flask is a web server gateway interface WSGI web application framework. In versions 3.1.2 and below, when the session object is accessed, Flask should set the Vary: Cookie header., resulting in a Use of Cache Containing Sensitive Information vulnerability. The logic instructs caches not to cache...

CVE-2026-27205

CVE-2026-27205 – Flask cache-related information disclosure (root cause: Vary: Cookie not set when session accessed) Affected: Flask 3.1.2 and below. In these versions, accessing the session object may cause a response to be cached with user-specific data, as the Vary: Cookie header is not consis...

CVE-2026-27205: Use of Cache Containing Sensitive Information

Flask is a web server gateway interface WSGI web application framework. In versions 3.1.2 and below, when the session object is accessed, Flask should set the Vary: Cookie header., resulting in a Use of Cache Containing Sensitive Information vulnerability. The logic instructs caches not to cache...

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...

Flask session does not add `Vary: Cookie` header when accessed in some ways

When the session object is accessed, Flask should set the Vary: Cookie header. This instructs caches not to cache the response, as it may contain information specific to a logged in user. This is handled in most cases, but some forms of access such as the Python in operator were overlooked. The...

GHSA-68RP-WP8R-4726 Flask session does not add `Vary: Cookie` header when accessed in some ways

When the session object is accessed, Flask should set the Vary: Cookie header. This instructs caches not to cache the response, as it may contain information specific to a logged in user. This is handled in most cases, but some forms of access such as the Python in operator were overlooked. The...

PT-2026-21353

Name of the Vulnerable Software and Affected Versions Flask versions 3.1.2 and below Description Flask, a web server gateway interface WSGI web application framework, may improperly handle caching when accessing the session object. Specifically, it may fail to set the 'Vary: Cookie' header,...

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...

CVE-2026-25577 Emmett has an Unhandled CookieError Exception Causing Denial of Service

Emmett is a framework designed to simplify your development process. Prior to 1.3.11, the cookies property in mmettcore.http.wrappers.Request does not handle CookieError exceptions when parsing malformed Cookie headers. This allows unauthenticated attackers to trigger HTTP 500 errors and cause...

Emmett-Core: Unhandled CookieError Exception Causing Denial of Service

Summary The cookies property in emmettcore.http.wrappers.Request does not handle CookieError exceptions when parsing malformed Cookie headers. This allows unauthenticated attackers to trigger HTTP 500 errors and cause denial of service. Details Location: emmettcore/http/wrappers/init.py line 64...

GHSA-GV3V-2CPP-3PMQ Keycloak logs sensitive headers

A flaw was found in Keycloak. When the logging format is configured to a verbose, user-supplied pattern such as the pre-defined 'long' pattern, sensitive headers including Authorization and Cookie are disclosed to the logs in cleartext. An attacker with read access to the log files can extract...

Keycloak logs sensitive headers

A flaw was found in Keycloak. When the logging format is configured to a verbose, user-supplied pattern such as the pre-defined 'long' pattern, sensitive headers including Authorization and Cookie are disclosed to the logs in cleartext. An attacker with read access to the log files can extract...

CVE-2025-11537

A flaw was found in Keycloak. When the logging format is configured to a verbose, user-supplied pattern such as the pre-defined 'long' pattern, sensitive headers including Authorization and Cookie are disclosed to the logs in cleartext. An attacker with read access to the log files can extract...

CVE-2025-11537

In CVE-2025-11537, a flaw in Keycloak causes sensitive headers (Authorization and Cookie) to be logged when the logging format uses verbose templates (e.g., the predefined 'long' pattern). An attacker with read access to log files can extract credentials (bearer tokens, session cookies) and imper...

CVE-2025-11537

A flaw was found in Keycloak. When the logging format is configured to a verbose, user-supplied pattern such as the pre-defined 'long' pattern, sensitive headers including Authorization and Cookie are disclosed to the logs in cleartext. An attacker with read access to the log files can extract...

CVE-2025-11537 Keycloak-services: sensitive headers shown in the http access logs

A flaw was found in Keycloak. When the logging format is configured to a verbose, user-supplied pattern such as the pre-defined 'long' pattern, sensitive headers including Authorization and Cookie are disclosed to the logs in cleartext. An attacker with read access to the log files can extract...

CVE-2025-11537 Keycloak-services: sensitive headers shown in the http access logs

A flaw was found in Keycloak. When the logging format is configured to a verbose, user-supplied pattern such as the pre-defined 'long' pattern, sensitive headers including Authorization and Cookie are disclosed to the logs in cleartext. An attacker with read access to the log files can extract...

PT-2026-7261

Name of the Vulnerable Software and Affected Versions Keycloak affected versions not specified Description A flaw exists in Keycloak where sensitive headers, including Authorization and Cookie, are disclosed in cleartext within log files when a verbose, user-supplied logging format—such as the...

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...