CVE-2026-111924Fleet before 4.83.0 Denial of Service via Unbounded Gzip Decompression
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-409
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Received
- Record last updated
- Oct 17, 2026
- First seen by InfoSec Signals
- Oct 17, 2026
Affected products
fleetdm fleet fleetdm:fleet (from the name) | before 4.83.0; 4.83.0 not affected | CNA record |
References
- https://github.com/fleetdm/fleet/security/advisories/GHSA-3982-g48v-9rwhvendor-advisory
- https://www.vulncheck.com/advisories/fleet-before-4.83.0-denial-of-service-via-unbounded-gzip-decompressionthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.