Denial of Service Vulnerability in Bugsink by Bugsink Inc.

CVE-2025-64509

What is CVE-2025-64509?

In Bugsink, a self-hosted error tracking tool, versions prior to 2.0.6 are susceptible to a vulnerability that allows an attacker to exploit a specially crafted Brotli-compressed envelope. This exploitation can lead to significant CPU exhaustion during the decompression process, resulting in a denial of service. The vulnerability arises when the Data Source Name (DSN) is known, a common scenario in various deployments such as JavaScript and mobile applications. The issue has been resolved in Bugsink version 2.0.6, although it shares similarities with another Brotli-related vulnerability in the system.

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