In affected versions, 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).
Patched in Bugsink 2.0.6
The vulnerability in this security advisory is similar to, but distinct from, another brotli-related problem in Bugsink:
https://github.com/bugsink/bugsink/security/advisories/GHSA-fc2v-vcwj-269v
{
"cwe_ids": [
"CWE-770"
],
"nvd_published_at": "2025-11-10T22:15:39Z",
"github_reviewed": true,
"severity": "HIGH",
"github_reviewed_at": "2025-11-13T00:11:26Z"
}