CVE-2026-42946

{"id": "CVE-2026-42946", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-42946", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-13T15:55:04.864917Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "f5sirt@f5.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 4.2, "exploitabilityScore": 2.2}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.4, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 2.2}], "cvssMetricV40": [{"type": "Secondary", "source": "f5sirt@f5.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.3, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "f5sirt@f5.com", "affectedData": [{"vendor": "F5", "modules": ["ngx_http_scgi_module and ngx_http_uwsgi_module"], "product": "NGINX Plus", "versions": [{"status": "unaffected", "version": "R37", "lessThan": "*", "versionType": "custom"}, {"status": "affected", "version": "R36", "lessThan": "R36 P4", "versionType": "custom"}, {"status": "affected", "version": "R32", "lessThan": "R32 P6", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "F5", "modules": ["ngx_http_scgi_module and ngx_http_uwsgi_module"], "product": "NGINX Open Source", "versions": [{"status": "unaffected", "version": "1.31.0", "lessThan": "*", "versionType": "semver"}, {"status": "affected", "version": "0.8.42", "lessThan": "1.30.1", "versionType": "semver"}], "defaultStatus": "unaffected"}]}], "published": "2026-05-13T16:16:50.340", "references": [{"url": "https://my.f5.com/manage/s/article/K000161027", "tags": ["Mitigation", "Vendor Advisory"], "source": "f5sirt@f5.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "f5sirt@f5.com", "description": [{"lang": "en", "value": "CWE-789"}, {"lang": "en", "value": "CWE-823"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability exists in the ngx_http_scgi_module\u00a0and ngx_http_uwsgi_module\u00a0modules that may result in excessive memory allocation or an over-read of data. When scgi_pass\u00a0or uwsgi_pass\u00a0is configured, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to read the memory of the NGINX worker process or restart it.\u00a0 Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated."}, {"lang": "es", "value": "Una vulnerabilidad existe en los m\u00f3dulos ngx_http_scgi_module y ngx_http_uwsgi_module que puede resultar en asignaci\u00f3n excesiva de memoria o una lectura excesiva de datos. Cuando scgi_pass o uwsgi_pass est\u00e1 configurado, un atacante no autenticado con capacidad de man-in-the-middle (MitM) para controlar las respuestas de un servidor upstream puede ser capaz de leer la memoria del proceso worker de NGINX o reiniciarlo. Nota: Las versiones de software que han alcanzado el Fin de Soporte T\u00e9cnico (EoTS) no son evaluadas."}], "lastModified": "2026-10-26T14:10:00.130", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:f5:dos:*:*:*:*:*:nginx:*:*", "vulnerable": true, "matchCriteriaId": "0772572C-26F9-4FA4-B9E6-BA40ED59F569", "versionEndIncluding": "4.7.0", "versionStartIncluding": "4.3.0"}, {"criteria": "cpe:2.3:a:f5:dos:4.8.0:*:*:*:*:nginx:*:*", "vulnerable": true, "matchCriteriaId": "C45452BD-7A86-48E7-8E1D-1B340FF70B3B"}, {"criteria": "cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "15B7F1FD-0C49-460F-9CB8-23DA730EC4BE", "versionEndIncluding": "1.6.2", "versionStartIncluding": "1.3.0"}, {"criteria": "cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0A6AA23F-A7A1-43DE-AD67-0EB1249143A4", "versionEndIncluding": "2.6.0", "versionStartIncluding": "2.0.0"}, {"criteria": "cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "10D5B143-4C1E-4626-8B49-3EA7160E9256", "versionEndIncluding": "3.7.2", "versionStartIncluding": "3.5.0"}, {"criteria": "cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "73A1CDBB-49F6-4AB6-AA67-542FD8017D6A", "versionEndIncluding": "4.0.1", "versionStartIncluding": "4.0.0"}, {"criteria": "cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "607EEFA3-BE2A-4660-8C67-E6FC9799325F", "versionEndIncluding": "5.4.2", "versionStartIncluding": "5.0.0"}, {"criteria": "cpe:2.3:a:f5:nginx_instance_manager:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CBC31553-99DE-4155-A8E5-13A84FCCB610", "versionEndIncluding": "2.22.0", "versionStartIncluding": "2.16.0"}, {"criteria": "cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C28A19F7-DD00-4D55-982F-15C15A9C0128", "versionEndIncluding": "0.9.7", "versionStartIncluding": "0.8.42"}, {"criteria": "cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BC94D0FA-F4AE-4178-AE9A-8CB645E3DF7C", "versionEndIncluding": "1.30.0", "versionStartIncluding": "1.0.0"}, {"criteria": "cpe:2.3:a:f5:nginx_plus:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0B153576-468F-48C2-9BC8-922A938AB235", "versionEndIncluding": "r36", "versionStartIncluding": "r32"}, {"criteria": "cpe:2.3:a:f5:waf:*:*:*:*:*:nginx:*:*", "vulnerable": true, "matchCriteriaId": "F365BA5A-42D7-4024-9143-06D4DEE31212", "versionEndIncluding": "4.16.0", "versionStartIncluding": "4.9.0"}, {"criteria": "cpe:2.3:a:f5:waf:*:*:*:*:*:nginx:*:*", "vulnerable": true, "matchCriteriaId": "8D720985-9119-480E-929A-7D9D5C083628", "versionEndIncluding": "5.8.0", "versionStartIncluding": "5.1.0"}, {"criteria": "cpe:2.3:a:f5:waf:*:*:*:*:*:nginx:*:*", "vulnerable": true, "matchCriteriaId": "DE69C522-7FCB-4452-8E33-FCC72D36BF94", "versionEndIncluding": "5.12.1", "versionStartIncluding": "5.9.0"}], "operator": "OR"}]}], "sourceIdentifier": "f5sirt@f5.com"}