{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-97205", "assignerOrgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab", "state": "PUBLISHED", "assignerShortName": "f5", "dateReserved": "2026-09-30T21:56:14.607Z", "datePublished": "2026-10-14T14:40:27.487Z", "dateUpdated": "2026-10-15T10:31:15.547Z" }, "containers": { "cna": { "affected": [ { "defaultStatus": "unknown", "modules": [ "ngx_http_core_module" ], "product": "NGINX Plus", "vendor": "F5", "versions": [ { "lessThan": "37.1.0.1", "status": "affected", "version": "37.1.0", "versionType": "custom" }, { "lessThan": "37.0.5.1", "status": "affected", "version": "37.0.0", "versionType": "custom" }, { "lessThan": "*", "status": "affected", "version": "R36", "versionType": "custom" }, { "lessThan": "*", "status": "affected", "version": "R35", "versionType": "custom" }, { "lessThan": "*", "status": "affected", "version": "R34", "versionType": "custom" }, { "lessThan": "*", "status": "affected", "version": "R33", "versionType": "custom" } ] }, { "defaultStatus": "unaffected", "modules": [ "ngx_http_core_module" ], "product": "NGINX Open Source", "vendor": "F5", "versions": [ { "lessThan": "1.31.7", "status": "affected", "version": "1.31.0", "versionType": "custom" }, { "lessThan": "1.30.6", "status": "affected", "version": "1.30.0", "versionType": "custom" } ] } ], "credits": [ { "lang": "en", "type": "reporter", "value": "F5 acknowledges Cyberlanc3r for bringing this issue to our attention and following the highest standards of coordinated disclosure." } ], "datePublic": "2026-10-14T14:00:00.000Z", "descriptions": [ { "lang": "en", "supportingMedia": [ { "base64": false, "type": "text/html", "value": "NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_core_module module. When asynchronous file I/O (AIO) is enabled in certain configurations, processing a Server Side Includes (SSI) page containing “include virtual” commands may trigger a Use-After-Free (UAF) in the NGINX worker process. This may cause memory corruption or a worker process crash. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR.

Impact:
This vulnerability may allow remote attackers to cause a denial-of-service (DoS) on the NGINX system, corrupt its memory, or possibly trigger code execution. There is no control plane exposure; this is a data plane issue only.

\n\n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated." } ], "value": "NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_core_module module. When asynchronous file I/O (AIO) is enabled in certain configurations, processing a Server Side Includes (SSI) page containing “include virtual” commands may trigger a Use-After-Free (UAF) in the NGINX worker process. This may cause memory corruption or a worker process crash. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR.\n\nImpact:\nThis vulnerability may allow remote attackers to cause a denial-of-service (DoS) on the NGINX system, corrupt its memory, or possibly trigger code execution. There is no control plane exposure; this is a data plane issue only.\n\n\n\n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated." } ], "impacts": [ { "capecId": "CAPEC-234", "descriptions": [ { "lang": "en", "value": "CAPEC-234 Hijacking a privileged process" } ] } ], "metrics": [ { "cvssV3_1": { "attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ] }, { "cvssV4_0": { "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 9.2, "baseSeverity": "CRITICAL", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED" }, "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ] } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-416", "description": "CWE-416 Use After Free", "lang": "en", "type": "CWE" } ] } ], "providerMetadata": { "orgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab", "shortName": "f5", "dateUpdated": "2026-10-14T14:40:27.487Z" }, "references": [ { "tags": [ "vendor-advisory" ], "url": "https://my.f5.com/manage/s/article/K000162608" } ], "source": { "discovery": "EXTERNAL" }, "title": "NGINX ngx_http_core_module vulnerability", "workarounds": [ { "lang": "en", "supportingMedia": [ { "base64": false, "type": "text/html", "value": "Disable the \"aio\" directive or do not serve SSI pages.
" } ], "value": "Disable the \"aio\" directive or do not serve SSI pages." } ], "x_generator": { "engine": "F5 SIRTBot v1.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2026-97205", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2026-10-15T03:57:01.124115Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T10:31:15.547Z" } } ] } }