{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-94127", "assignerOrgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab", "state": "PUBLISHED", "assignerShortName": "f5", "dateReserved": "2026-09-20T17:39:19.975Z", "datePublished": "2026-09-22T14:17:42.730Z", "dateUpdated": "2026-09-23T03:55:44.614Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab", "shortName": "f5", "dateUpdated": "2026-09-23T00:45:09.611Z" }, "title": "BIG-IP APM OAuth vulnerability", "datePublic": "2026-09-22T14:00:00.000Z", "problemTypes": [ { "descriptions": [ { "lang": "en", "cweId": "CWE-122", "description": "CWE-122 Heap-based Buffer Overflow", "type": "CWE" } ] } ], "impacts": [ { "capecId": "CAPEC-100", "descriptions": [ { "lang": "en", "value": "CAPEC-100 Overflow Buffers" } ] } ], "affected": [ { "vendor": "F5", "product": "BIG-IP", "modules": [ "APM" ], "versions": [ { "status": "affected", "version": "21.1.0", "lessThan": "Hotfix-BIGIP-21.1.0.2.0.30.22-ENG", "versionType": "custom" }, { "status": "affected", "version": "17.5.0", "lessThan": "Hotfix-BIGIP-17.5.1.9.0.160.12-ENG", "versionType": "custom" }, { "status": "affected", "version": "17.1.0", "lessThan": "Hotfix-BIGIP-17.1.3.5.0.41.14-ENG", "versionType": "custom" } ], "defaultStatus": "unknown" } ], "descriptions": [ { "lang": "en", "value": "When a BIG-IP APM access policy and an OAuth profile are configured on a virtual server, specific malicious traffic can lead to remote code execution (RCE). This vulnerability is only present when BIG-IP APM is configured as an OAuth Authorization Server. Deployments using APM strictly as an OAuth Client / Resource Server (without OAuth authorization server profiles configured) are not affected by this vulnerability.\n\nImpact:\nThis vulnerability allows an unauthenticated attacker to perform remote code execution. The BIG-IP system in Appliance mode is also vulnerable. This is a data plane issue; there is no control plane exposure.\n\n \n\n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "When a BIG-IP APM access policy and an OAuth profile are configured on a virtual server, specific malicious traffic can lead to remote code execution (RCE). This vulnerability is only present when BIG-IP APM is configured as an OAuth Authorization Server. Deployments using APM strictly as an OAuth Client / Resource Server (without OAuth authorization server profiles configured) are not affected by this vulnerability.

Impact:
This vulnerability allows an unauthenticated attacker to perform remote code execution. The BIG-IP system in Appliance mode is also vulnerable. This is a data plane issue; there is no control plane exposure.

\n\n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated." } ] } ], "references": [ { "url": "https://my.f5.com/manage/s/article/K000162605", "tags": [ "vendor-advisory" ] } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV3_1": { "version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "CRITICAL", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H" } }, { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV4_0": { "version": "4.0", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "baseSeverity": "CRITICAL", "baseScore": 9.3, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N" } } ], "workarounds": [ { "lang": "en", "value": "An iRule is available upon request.\nOpen a ticket with F5 support to request this.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "An iRule is available upon request.
Open a ticket with F5 support to request this." } ] } ], "credits": [ { "lang": "en", "value": "F5", "type": "finder" } ], "source": { "discovery": "INTERNAL" }, "x_generator": { "engine": "F5 SIRTBot v1.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-09-22T00:00:00+00:00", "options": [ { "Exploitation": "active" }, { "Automatable": "yes" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-94127" } } }, { "other": { "type": "kev", "content": { "dateAdded": "2026-09-22", "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-94127" } } } ], "references": [ { "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-94127", "tags": [ "government-resource" ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-23T03:55:44.614Z" }, "timeline": [ { "time": "2026-09-22T00:00:00.000Z", "lang": "en", "value": "CVE-2026-94127 added to CISA KEV" } ] } ] } }