CVE-2026-78594

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-78594", "assignerOrgId": "271b6943-45a9-4f3a-ab4e-976f3fa05b5a", "state": "PUBLISHED", "assignerShortName": "elastic", "dateReserved": "2026-08-24T21:13:51.299Z", "datePublished": "2026-09-02T14:43:13.303Z", "dateUpdated": "2026-09-02T15:58:12.264Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "Apm Server", "vendor": "Elastic", "versions": [{"status": "affected", "versionType": "semver", "version": "8.0.0", "lessThanOrEqual": "8.19.19"}, {"status": "affected", "versionType": "semver", "version": "9.0.0", "lessThanOrEqual": "9.4.4"}, {"status": "affected", "versionType": "semver", "version": "9.5.0"}]}], "descriptions": [{"lang": "en", "value": "Improper Handling of Highly Compressed Data (CWE-409) in APM Server can lead to a persistent denial of service via Excessive Allocation (CAPEC-130). An authenticated user with write access to source map content could store specially crafted, highly compressed content that exhausts the memory available to APM Server when it is later processed, terminating the process. The condition recurs on every restart until the stored content is removed.", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Improper Handling of Highly Compressed Data (CWE-409) in APM Server can lead to a persistent denial of service via Excessive Allocation (CAPEC-130). An authenticated user with write access to source map content could store specially crafted, highly compressed content that exhausts the memory available to APM Server when it is later processed, terminating the process. The condition recurs on every restart until the stored content is removed.</p>"}]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "baseScore": 4.9, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-409", "description": "CWE-409 Improper Handling of Highly Compressed Data (Data Amplification)", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "271b6943-45a9-4f3a-ab4e-976f3fa05b5a", "shortName": "elastic", "dateUpdated": "2026-09-02T14:43:13.303Z"}, "references": [{"url": "https://discuss.elastic.co/t/apm-server-8-19-20-9-4-5-9-5-1-security-update-esa-2026-152/390110"}], "source": {"discovery": "Elastic"}, "title": "Improper Handling of Highly Compressed Data in APM Server Leading to Persistent Denial of Service", "x_generator": {"engine": "Elastic CVE Publisher 1.0.0"}, "impacts": [{"capecId": "CAPEC-130", "descriptions": [{"lang": "en", "value": "CAPEC-130 Excessive Allocation"}]}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-78594", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-02T15:44:44.239209Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-02T15:58:12.264Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-78594", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-02T15:44:44.239209Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-02T15:50:54.060Z"}}], "cna": {"title": "Improper Handling of Highly Compressed Data in APM Server Leading to Persistent Denial of Service", "source": {"discovery": "Elastic"}, "impacts": [{"capecId": "CAPEC-130", "descriptions": [{"lang": "en", "value": "CAPEC-130 Excessive Allocation"}]}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "NONE"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Elastic", "product": "Apm Server", "versions": [{"status": "affected", "version": "8.0.0", "versionType": "semver", "lessThanOrEqual": "8.19.19"}, {"status": "affected", "version": "9.0.0", "versionType": "semver", "lessThanOrEqual": "9.4.4"}, {"status": "affected", "version": "9.5.0", "versionType": "semver"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://discuss.elastic.co/t/apm-server-8-19-20-9-4-5-9-5-1-security-update-esa-2026-152/390110"}], "x_generator": {"engine": "Elastic CVE Publisher 1.0.0"}, "descriptions": [{"lang": "en", "value": "Improper Handling of Highly Compressed Data (CWE-409) in APM Server can lead to a persistent denial of service via Excessive Allocation (CAPEC-130). An authenticated user with write access to source map content could store specially crafted, highly compressed content that exhausts the memory available to APM Server when it is later processed, terminating the process. The condition recurs on every restart until the stored content is removed.", "supportingMedia": [{"type": "text/html", "value": "<p>Improper Handling of Highly Compressed Data (CWE-409) in APM Server can lead to a persistent denial of service via Excessive Allocation (CAPEC-130). An authenticated user with write access to source map content could store specially crafted, highly compressed content that exhausts the memory available to APM Server when it is later processed, terminating the process. The condition recurs on every restart until the stored content is removed.</p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-409", "description": "CWE-409 Improper Handling of Highly Compressed Data (Data Amplification)"}]}], "providerMetadata": {"orgId": "271b6943-45a9-4f3a-ab4e-976f3fa05b5a", "shortName": "elastic", "dateUpdated": "2026-09-02T14:43:13.303Z"}}}, "cveMetadata": {"cveId": "CVE-2026-78594", "state": "PUBLISHED", "dateUpdated": "2026-09-02T15:58:12.264Z", "dateReserved": "2026-08-24T21:13:51.299Z", "assignerOrgId": "271b6943-45a9-4f3a-ab4e-976f3fa05b5a", "datePublished": "2026-09-02T14:43:13.303Z", "assignerShortName": "elastic"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Apm Server", "vendor": "Elastic", "versions": [{"lessThanOrEqual": "8.19.19", "status": "affected", "version": "8.0.0", "versionType": "semver"}, {"lessThanOrEqual": "9.4.4", "status": "affected", "version": "9.0.0", "versionType": "semver"}, {"status": "affected", "version": "9.5.0", "versionType": "semver"}]}], "source": "security@elastic.co"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:elastic:apm_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "81638476-40DE-4AE4-A9BC-FD19B84FF638", "versionEndExcluding": "8.19.20", "versionStartIncluding": "8.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:elastic:apm_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "E7DA1479-F31C-40C2-87D2-5CF02D1073D6", "versionEndExcluding": "9.4.5", "versionStartIncluding": "9.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:elastic:apm_server:9.5.0:*:*:*:*:*:*:*", "matchCriteriaId": "299D9250-EB19-4E6E-98E3-F8D0DE7261C3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Handling of Highly Compressed Data (CWE-409) in APM Server can lead to a persistent denial of service via Excessive Allocation (CAPEC-130). An authenticated user with write access to source map content could store specially crafted, highly compressed content that exhausts the memory available to APM Server when it is later processed, terminating the process. The condition recurs on every restart until the stored content is removed."}], "id": "CVE-2026-78594", "lastModified": "2026-09-03T19:13:49.230", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 4.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 3.6, "source": "security@elastic.co", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-78594", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-02T15:44:44.239209Z", "version": "2.0.3"}}]}, "published": "2026-09-02T15:17:40.700", "references": [{"source": "security@elastic.co", "tags": ["Vendor Advisory", "Mitigation"], "url": "https://discuss.elastic.co/t/apm-server-8-19-20-9-4-5-9-5-1-security-update-esa-2026-152/390110"}], "sourceIdentifier": "security@elastic.co", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-409"}], "source": "security@elastic.co", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[8.0.0,8.19.19]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[9.0.0,9.4.4]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[9.5.0,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Apm Server", "source": "cna", "vendor": "Elastic"}, "product": "apm_server", "vendor": "elastic"}], "created": "2026-09-03T10:45:05.215151+00:00", "updated": "2026-09-03T12:00:04.114520+00:00", "vendors": ["elastic", "elastic$PRODUCT$apm_server"]}