CVE-2026-39972 Detail
Received
This CVE record has recently been published to the CVE List and has been included within the NVD dataset. DescriptionMercure is a protocol for pushing data updates to web browsers and other HTTP clients in a battery-efficient way. Prior to 0.22.0, 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. Because both topic selectors and topics can contain underscores, two distinct pairs can produce the same key. An attacker who can subscribe to the hub or publish updates with crafted topic names can exploit this to bypass authorization checks on private updates. This vulnerability is fixed in 0.22.0. Metrics
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Weakness Enumeration
Quick InfoCVE Dictionary Entry:CVE-2026-39972 NVD Published Date: 04/09/2026 NVD Last Modified: 04/09/2026 Source: GitHub, Inc. |
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