Vulnerability Description
Bugsink is a self-hosted error tracking tool. In versions prior to 2.0.5, brotli "bombs" (highly compressed brotli streams, such as many zeros) can be sent to the server. Since the server will attempt to decompress these streams before applying various maximums, this can lead to exhaustion of the available memory and thus a 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 version `2.0.5`. The vulnerability is similar to, but distinct from, another brotli-related problem in Bugsink, GHSA-rrx3-2x4g-mq2h/CVE-2025-64509.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/bugsink/bugsink/commit/3f65544aab3ad5303d97009136640de97b0676
- https://github.com/bugsink/bugsink/pull/266
- https://github.com/bugsink/bugsink/security/advisories/GHSA-fc2v-vcwj-269v
- https://github.com/google/brotli/commit/67d78bc41db1a0d03f2e763497748f2f69946627
- https://github.com/google/brotli/issues/1327
- https://github.com/google/brotli/issues/1375
- https://github.com/google/brotli/pull/1234
- https://github.com/google/brotli/releases/tag/v1.2.0
FAQ
What is CVE-2025-64508?
CVE-2025-64508 is a vulnerability with a CVSS score of 7.5 (HIGH). Bugsink is a self-hosted error tracking tool. In versions prior to 2.0.5, brotli "bombs" (highly compressed brotli streams, such as many zeros) can be sent to the server. Since the server will attempt...
How severe is CVE-2025-64508?
CVE-2025-64508 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-64508?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.