mercure has Topic Selector Cache Key Collision
A cache key collision vulnerability in TopicSelectorStore allows an attacker to poison the match result cache, potentially causing private updates to be delivered to unauthorized subscribers or blocking delivery to authorized ones. The cache key was constructed by concatenating the topic selector and topic with an underscore separator: k = "m_" + topicSelector + "_" + topic Because both topic selectors and topics can contain underscores, two distinct pairs can …