SUSE SLED15 / SLES15 / openSUSE 15 Security Update : python-Flask (SUSE-SU-2026:0849-1)

The remote SUSE Linux SLED15 / SLEDSAP15 / SLES15 / SLESSAP15 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2026:0849-1 advisory. This update for python-Flask fixes the following issue: - CVE-2026-27205: information disclosure due to...

Security update for python-Flask

This update for python-Flask fixes the following issue: CVE-2026-27205: information disclosure due to Flask session not adding the Vary: Cookie header bsc1258700. Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST onlineupdate or "zypper patch"...

SUSE-SU-2026:0849-1 Security update for python-Flask

This update for python-Flask fixes the following issue: - CVE-2026-27205: information disclosure due to Flask session not adding the Vary: Cookie header bsc1258700...

Sensitive Information Exposure

Flask is vulnerable to Sensitive Information Exposure. The vulnerability is due to incomplete handling of the Vary: Cookie header when accessing the session object, where certain access patterns e.g., using the in operator fail to mark responses as user-specific, allowing caching proxies to store...

SUSE 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

A flaw was found in Flask, a Web Server Gateway Interface WSGI web application framework. When a Flask application accesses the session object using certain methods, it may fail to set the Vary: Cookie header. This oversight can cause sensitive, user-specific information to be improperly cached b...

PYSEC-2026-2151

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

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

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

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

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

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...

Flask 安全漏洞

Flask is a Python micro-framework developed by Pallets, used for building web applications. Versions of Flask prior to 3.1.2 have a security vulnerability caused by an improper setting of the Vary header when accessing session objects. This vulnerability may lead to the use of cache containing...

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...

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...

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,...

How safe are kids using social media? We did the groundwork

When researchers created an account for a child under 13 on Roblox, they expected heavy guardrails. Instead, they found that the platform’s search features still allowed kids to discover communities linked to fraud and other illicit activity. The discoveries spotlight the question that lawmakers...