CVE-2025-64509
HIGHBugsink < 2.0.6 - Denial of Service via Brotli Decompression
Title source: llmDescription
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.
References (1)
Core 1
Core References
Vendor Advisory x_refsource_confirm
https://github.com/bugsink/bugsink/security/advisories/GHSA-rrx3-2x4g-mq2h
Scores
CVSS v3
7.5
EPSS
0.0011
EPSS Percentile
28.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-770
Status
published
Products (2)
bugsink/bugsink
< 2.0.6
pypi/bugsink
0 - 2.0.6PyPI
Published
Nov 10, 2025
Tracked Since
Feb 18, 2026