{"id":"CVE-2026-24000","revision":"b8deab09add6448fb41fc74b3218da1c","records":[{"revision":"b8deab09add6448fb41fc74b3218da1c","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-24000","aliases":[],"title":"Fleet has a rate limiting bypass via untrusted client IP headers","description":"Fleet is open source device management software. Prior to version 4.80.1, Fleet trusted client-supplied IP address headers when determining the source IP for incoming requests. This allowed authenticated and unauthenticated clients to spoof their apparent IP address and bypass per-IP rate limiting controls. Fleet determines a client’s public IP address using HTTP headers such as X-Forwarded-For, X-Real-IP, and/or True-Client-IP. These headers were trusted without validation. An attacker could supply arbitrary values in these headers, causing Fleet to treat each request as originating from a different IP address. This could allow an attacker to bypass per-IP rate limits and increase the effectiveness of brute-force or password-spraying attempts against authentication endpoints. This issue does not allow authentication bypass, privilege escalation, data exposure, or remote code execution on its own. Version 4.80.1 contains a patch. As a workaround, run Fleet behind a trusted reverse proxy or load balancer that overwrites client IP headers.","state":0,"publishedAt":"2026-05-14T18:56:39.139+00:00","modifiedAt":"2026-05-14T19:41:20.49+00:00","affected":[{"ecosystem":"Vendor product","name":"fleet","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"fleetdm\",\n                    \"product\": \"fleet\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 4.80.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","score":6.9,"severity":"MEDIUM"}],"references":["https://github.com/fleetdm/fleet/security/advisories/GHSA-j8h8-75h3-jg53","https://github.com/fleetdm/fleet/releases/tag/fleet-v4.80.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-24000","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-24000","identifiers":["CVE-2026-24000"]},"retained":false,"historicalAffected":[]}],"coverage":[]}