web cookie best practices

The tag web cookie best practices covers security considerations for cookie handling in web browsers, with a focus on the SameSite attribute. A recent discussion examines CVE-2024-6611, a Firefox and Thunderbird vulnerability where SameSite=Strict or SameSite=Lax cookies were incorrectly included in cross-site requests from nested iframes, potentially leading to cookie leakage or session abuse. The thread details the technical nuances of the bug, vendor severity discrepancies, and mitigation steps. This content is relevant for browser security teams and site operators looking to understand real-world cookie security issues and apply best practices for SameSite configuration and iframe handling.