CVE-2025-64509
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductBugsink
PublishedNov 10, 2025
First seenNov 10, 2025
Weakness typeCWE-770Allocation of resources without limits
How to fix
Update
- bugsink2.0.6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| bugsinkPyPI | v < 2.0.6 | 2.0.6 |
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