CVE-2026-111924

7.5High

Published 17 Oct 2026 · NVD status: Received · AI triage by gemini-3.8-flash

7.5High

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Impact: High impact on availability
Weakness: CWE-409

Impact

Unauthenticated remote attackers can crash the Fleet server by exhausting its memory. They only need network access to send gzip-compressed requests to unauthenticated endpoints.

Root cause

The server performs unbounded decompression on gzip-encoded request bodies, leading to memory exhaustion via decompression bombs.

Affected systems

Fleet before 4.83.0

CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Fix & remediation

Upgrade Fleet to version 4.83.0 or later. If patching immediately is not possible, drop or reject requests containing 'Content-Encoding: gzip' at your reverse proxy or load balancer.

shell

$ fleet version

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

Ad · In-content banner

NVD 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.

References

Source: nvd.nist.gov/vuln/detail/CVE-2026-111924