{"id":"CVE-2026-72657","state":"PUBLISHED","title":"Authorization Bypass Through User-Controlled Key in Fleet Server Leading to Information Disclosure","description":"Authorization Bypass Through User-Controlled Key (CWE-639) in Fleet Server can lead to information disclosure via Manipulating User-Controlled Variables (CAPEC-77). The authorization decision for artifact downloads relied on a client-supplied value that was persisted without being validated against the server-side record of the requesting agent's assignment. An authenticated party in possession of a valid enrolled agent credential could therefore retrieve a policy the agent is not assigned to.","publishedAt":"2026-08-13T19:13:28.867Z","updatedAt":"2026-08-13T20:29:19.842Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","source":"elastic"},"assigner":"elastic","products":["Elastic Fleet Server"],"affected":[{"vendor":"Elastic","product":"Fleet Server","defaultStatus":"unaffected","versions":[{"version":"8.3.0","status":"affected","lessThanOrEqual":"8.19.19","versionType":"semver"},{"version":"9.0.0","status":"affected","lessThanOrEqual":"9.4.4","versionType":"semver"},{"version":"9.5.0","status":"affected","versionType":"semver"}]}],"references":["https://discuss.elastic.co/t/fleet-server-8-19-20-9-4-5-9-5-1-security-update-esa-2026-112/389509"],"weaknesses":["CWE-639"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/72xxx/CVE-2026-72657.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72657","state":"PUBLISHED","datePublished":"2026-08-13T19:13:28.867Z","dateUpdated":"2026-08-13T20:29:19.842Z","assignerShortName":"elastic","assignerOrgId":"271b6943-45a9-4f3a-ab4e-976f3fa05b5a","dateReserved":"2026-08-10T11:17:38.893Z"},"containers":{"cna":{"title":"Authorization Bypass Through User-Controlled Key in Fleet Server Leading to Information Disclosure","descriptions":[{"lang":"en","value":"Authorization Bypass Through User-Controlled Key (CWE-639) in Fleet Server can lead to information disclosure via Manipulating User-Controlled Variables (CAPEC-77). The authorization decision for artifact downloads relied on a client-supplied value that was persisted without being validated against the server-side record of the requesting agent's assignment. An authenticated party in possession of a valid enrolled agent credential could therefore retrieve a policy the agent is not assigned to."}],"affected":[{"vendor":"Elastic","product":"Fleet Server","defaultStatus":"unaffected","versions":[{"version":"8.3.0","status":"affected","lessThanOrEqual":"8.19.19","versionType":"semver"},{"version":"9.0.0","status":"affected","lessThanOrEqual":"9.4.4","versionType":"semver"},{"version":"9.5.0","status":"affected","versionType":"semver"}]}],"references":[{"url":"https://discuss.elastic.co/t/fleet-server-8-19-20-9-4-5-9-5-1-security-update-esa-2026-112/389509"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-639","description":"CWE-639 Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"elastic","orgId":"271b6943-45a9-4f3a-ab4e-976f3fa05b5a","dateUpdated":"2026-08-13T19:13:28.867Z"},"source":{"discovery":"Elastic"},"x_generator":{"engine":"Elastic CVE Publisher 1.0.0"},"impacts":[{"capecId":"CAPEC-77","descriptions":[{"lang":"en","value":"CAPEC-77 Manipulating User-Controlled Variables"}]}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-13T19:51:05.667444Z","id":"CVE-2026-72657","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-13T20:29:19.842Z"}}]}}}