📦 Flask

by Palletsprojects

🔍 What is Flask?

Description coming soon...

🛡️ Security Overview

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⚠️ Known Vulnerabilities

CVE-2023-30861

HIGH CVSS 7.5 May 2, 2023

This vulnerability in Flask allows session cookie leakage when specific conditions are met with caching proxies. It affects Flask applications hosted behind proxies that cache responses with Set-Cooki...

CVE-2026-27205

MEDIUM CVSS 4.3 Feb 21, 2026

Flask versions 3.1.2 and below have a cache vulnerability where accessing session keys with certain Python operators (like 'in') fails to set proper cache headers. This could allow caching proxies to ...