CVE-2026-111924
Fleet before 4.83.0 Denial of Service via Unbounded Gzip Decompression
- State
- Published
- Severity
- 8.7 High
- Published
- Oct 17, 2026
- Updated
- Oct 19, 2026
- Reserved
- Oct 17, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-409 Improper Handling of Highly Compressed Data (Data Amplification)
Affected Products
| Product | Versions |
|---|---|
fleetfleetdm |
|
References
- GitHub Security Advisory (GHSA-3982-g48v-9rwh)vendor-advisory
- VulnCheck Advisory: Fleet before 4.83.0 Denial of Service via Unbounded Gzip Decompressionthird-party-advisory
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