{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-78587", "assignerOrgId": "271b6943-45a9-4f3a-ab4e-976f3fa05b5a", "state": "PUBLISHED", "assignerShortName": "elastic", "dateReserved": "2026-08-24T21:13:45.972Z", "datePublished": "2026-09-02T14:43:26.428Z", "dateUpdated": "2026-09-02T15:58:11.187Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "Fleet Server", "vendor": "Elastic", "versions": [{"status": "affected", "versionType": "semver", "version": "8.0.0", "lessThanOrEqual": "8.19.15"}, {"status": "affected", "versionType": "semver", "version": "9.0.0", "lessThanOrEqual": "9.3.4"}, {"status": "affected", "versionType": "semver", "version": "9.4.0", "lessThanOrEqual": "9.4.1"}]}], "descriptions": [{"lang": "en", "value": "Incorrect Authorization (CWE-863) in Fleet Server can lead to a denial of service of agent upload operations via Privilege Abuse (CAPEC-122). Fleet Server does not correctly verify session ownership during multi-part data upload operations, allowing any authenticated agent to interfere with the active upload sessions belonging to other enrolled agents.", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Incorrect Authorization (CWE-863) in Fleet Server can lead to a denial of service of agent upload operations via Privilege Abuse (CAPEC-122). Fleet Server does not correctly verify session ownership during multi-part data upload operations, allowing any authenticated agent to interfere with the active upload sessions belonging to other enrolled agents.</p>"}]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L", "baseScore": 3.1, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-863", "description": "CWE-863 Incorrect Authorization", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "271b6943-45a9-4f3a-ab4e-976f3fa05b5a", "shortName": "elastic", "dateUpdated": "2026-09-02T14:43:26.428Z"}, "references": [{"url": "https://discuss.elastic.co/t/fleet-server-8-19-16-9-3-5-9-4-2-security-update-esa-2026-164/390117"}], "source": {"discovery": "Elastic"}, "title": "Incorrect Authorization in Fleet Server Leading to Denial of Service of Agent Upload Operations", "x_generator": {"engine": "Elastic CVE Publisher 1.0.0"}, "impacts": [{"capecId": "CAPEC-122", "descriptions": [{"lang": "en", "value": "CAPEC-122 Privilege Abuse"}]}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-78587", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-02T15:45:55.968870Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-02T15:58:11.187Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-78587", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-02T15:45:55.968870Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-02T15:50:01.580Z"}}], "cna": {"title": "Incorrect Authorization in Fleet Server Leading to Denial of Service of Agent Upload Operations", "source": {"discovery": "Elastic"}, "impacts": [{"capecId": "CAPEC-122", "descriptions": [{"lang": "en", "value": "CAPEC-122 Privilege Abuse"}]}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 3.1, "attackVector": "NETWORK", "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Elastic", "product": "Fleet Server", "versions": [{"status": "affected", "version": "8.0.0", "versionType": "semver", "lessThanOrEqual": "8.19.15"}, {"status": "affected", "version": "9.0.0", "versionType": "semver", "lessThanOrEqual": "9.3.4"}, {"status": "affected", "version": "9.4.0", "versionType": "semver", "lessThanOrEqual": "9.4.1"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://discuss.elastic.co/t/fleet-server-8-19-16-9-3-5-9-4-2-security-update-esa-2026-164/390117"}], "x_generator": {"engine": "Elastic CVE Publisher 1.0.0"}, "descriptions": [{"lang": "en", "value": "Incorrect Authorization (CWE-863) in Fleet Server can lead to a denial of service of agent upload operations via Privilege Abuse (CAPEC-122). Fleet Server does not correctly verify session ownership during multi-part data upload operations, allowing any authenticated agent to interfere with the active upload sessions belonging to other enrolled agents.", "supportingMedia": [{"type": "text/html", "value": "<p>Incorrect Authorization (CWE-863) in Fleet Server can lead to a denial of service of agent upload operations via Privilege Abuse (CAPEC-122). Fleet Server does not correctly verify session ownership during multi-part data upload operations, allowing any authenticated agent to interfere with the active upload sessions belonging to other enrolled agents.</p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-863", "description": "CWE-863 Incorrect Authorization"}]}], "providerMetadata": {"orgId": "271b6943-45a9-4f3a-ab4e-976f3fa05b5a", "shortName": "elastic", "dateUpdated": "2026-09-02T14:43:26.428Z"}}}, "cveMetadata": {"cveId": "CVE-2026-78587", "state": "PUBLISHED", "dateUpdated": "2026-09-02T15:58:11.187Z", "dateReserved": "2026-08-24T21:13:45.972Z", "assignerOrgId": "271b6943-45a9-4f3a-ab4e-976f3fa05b5a", "datePublished": "2026-09-02T14:43:26.428Z", "assignerShortName": "elastic"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Fleet Server", "vendor": "Elastic", "versions": [{"lessThanOrEqual": "8.19.15", "status": "affected", "version": "8.0.0", "versionType": "semver"}, {"lessThanOrEqual": "9.3.4", "status": "affected", "version": "9.0.0", "versionType": "semver"}, {"lessThanOrEqual": "9.4.1", "status": "affected", "version": "9.4.0", "versionType": "semver"}]}], "source": "[email protected]"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Incorrect Authorization (CWE-863) in Fleet Server can lead to a denial of service of agent upload operations via Privilege Abuse (CAPEC-122). Fleet Server does not correctly verify session ownership during multi-part data upload operations, allowing any authenticated agent to interfere with the active upload sessions belonging to other enrolled agents."}], "id": "CVE-2026-78587", "lastModified": "2026-09-02T19:23:13.660", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 3.1, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 1.4, "source": "[email protected]", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-78587", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-02T15:45:55.968870Z", "version": "2.0.3"}}]}, "published": "2026-09-02T15:17:40.190", "references": [{"source": "[email protected]", "url": "https://discuss.elastic.co/t/fleet-server-8-19-16-9-3-5-9-4-2-security-update-esa-2026-164/390117"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-863"}], "source": "[email protected]", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[8.0.0,8.19.15]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[9.0.0,9.3.4]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[9.4.0,9.4.1]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Fleet Server", "source": "cna", "vendor": "Elastic"}, "product": "fleet_server", "vendor": "elastic"}], "created": "2026-09-03T10:30:12.537972+00:00", "updated": "2026-09-03T10:45:04.880660+00:00", "vendors": ["elastic", "elastic$PRODUCT$fleet_server"]}