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High · 7.5 CVE-2025-64509 EUVD-2025-50819GHSA-rrx3-2x4g-mq2hPYSEC-2026-1227

Bugsink vulnerable to unauthenticated remote DoS via crafted Brotli input (via CPU)

Published Nov 10, 2025 · Updated Nov 12, 2025 · Assigned by GitHub_M

Description

Bugsink is a self-hosted error tracking tool. In versions prior to 2.0.6, a specially crafted Brotli-compressed envelope can cause Bugsink to spend excessive CPU time in decompression, leading to denial of service. This can be done if the DSN is known, which it is in many common setups (JavaScript, Mobile Apps). The issue is patched in Bugsink 2.0.6. The vulnerability is similar to, but distinct from, another brotli-related problem in Bugsink, GHSA-fc2v-vcwj-269v/CVE-2025-64508.

Affected products

VendorProductAffectedFixed
bugsink bugsink < 2.0.6 —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI bugsink < 2.0.6 2.0.6 GHSA-rrx3-2x4g-mq2h

References