Description
Fleet before 4.83.0 contains a denial of service vulnerability that allows unauthenticated attackers to exhaust server memory by sending gzip-compressed request bodies. Attackers can send small, highly compressed requests with Content-Encoding: gzip to unauthenticated endpoints that expand during decoding, crashing the entire Fleet instance.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| fleetdm | fleet | < 4.83.0 | 4.83.0 |
Advisories 1
- WID-SEC-2026-4023 Fleet: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Oct 18, 2026
References
- GitHub Security Advisory (GHSA-3982-g48v-9rwh) vendor-advisory
- VulnCheck Advisory: Fleet before 4.83.0 Denial of Service via Unbounded Gzip Decompression third-party-advisory