CVE-2026-111924

EUVD-2026-103292
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.
Data Amplification
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 28.35%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
fleetdmfleet
𝑥
< 4.83.0
CNA
Common Weakness Enumeration
References
https://github.com/fleetdm/fleet/security/advisories/GHSA-3982-g48v-9rwh
https://www.vulncheck.com/advisories/fleet-before-4.83.0-denial-of-service-via-unbounded-gzip-decompression