CVE-2026-27651

{"id": "CVE-2026-27651", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-27651", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-03-24T15:02:03.137056Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "f5sirt@f5.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "f5sirt@f5.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.7, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "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_mail_auth_http_module"], "product": "NGINX Open Source", "versions": [{"status": "affected", "version": "1.29.0", "lessThan": "1.29.7", "versionType": "semver"}, {"status": "affected", "version": "0.5.15", "lessThan": "1.28.3", "versionType": "semver"}], "defaultStatus": "unknown"}, {"vendor": "F5", "modules": ["ngx_mail_auth_http_module"], "product": "NGINX Plus", "versions": [{"status": "affected", "version": "R36", "lessThan": "R36 P3", "versionType": "custom"}, {"status": "affected", "version": "R35", "lessThan": "R35 P2", "versionType": "custom"}, {"status": "affected", "version": "R34", "lessThan": "*", "versionType": "custom"}, {"status": "affected", "version": "R33", "lessThan": "*", "versionType": "custom"}, {"status": "affected", "version": "R32", "lessThan": "R32 P5", "versionType": "custom"}], "defaultStatus": "unaffected"}]}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "affectedData": [{"cpes": ["cpe:/o:redhat:enterprise_linux:10.1"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "versions": [{"status": "unaffected", "version": "2:1.26.3-2.el10_1.1", "lessThan": "*", "versionType": "rpm"}], "packageName": "nginx", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux_eus:10.0"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10.0 Extended Update Support", "versions": [{"status": "unaffected", "version": "2:1.26.3-1.el10_0.8", "lessThan": "*", "versionType": "rpm"}], "packageName": "nginx", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:enterprise_linux:8"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "versions": [{"status": "unaffected", "version": "8100020260401080144.489197e6", "lessThan": "*", "versionType": "rpm"}], "packageName": "nginx:1.24", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:enterprise_linux:9"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "versions": [{"status": "unaffected", "version": "9070020260331134728.9", "lessThan": "*", "versionType": "rpm"}], "packageName": "nginx:1.24", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:enterprise_linux:9"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "versions": [{"status": "unaffected", "version": "2:1.20.1-24.el9_7.2", "lessThan": "*", "versionType": "rpm"}], "packageName": "nginx", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:enterprise_linux:9"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "versions": [{"status": "unaffected", "version": "9070020260407080353.9", "lessThan": "*", "versionType": "rpm"}], "packageName": "nginx:1.26", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_e4s:9.0"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions", "versions": [{"status": "unaffected", "version": "1:1.20.1-10.el9_0.3", "lessThan": "*", "versionType": "rpm"}], "packageName": "nginx", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_e4s:9.2"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions", "versions": [{"status": "unaffected", "version": "1:1.20.1-14.el9_2.5", "lessThan": "*", "versionType": "rpm"}], "packageName": "nginx", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_eus:9.4"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.4 Extended Update Support", "versions": [{"status": "unaffected", "version": "1:1.20.1-16.el9_4.5", "lessThan": "*", "versionType": "rpm"}], "packageName": "nginx", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_eus:9.4"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.4 Extended Update Support", "versions": [{"status": "unaffected", "version": "9040020260504195322.9", "lessThan": "*", "versionType": "rpm"}], "packageName": "nginx:1.24", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_eus:9.6"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.6 Extended Update Support", "versions": [{"status": "unaffected", "version": "2:1.20.1-22.el9_6.5", "lessThan": "*", "versionType": "rpm"}], "packageName": "nginx", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_eus:9.6"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.6 Extended Update Support", "versions": [{"status": "unaffected", "version": "9060020260504194843.9", "lessThan": "*", "versionType": "rpm"}], "packageName": "nginx:1.24", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_eus:9.6"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.6 Extended Update Support", "versions": [{"status": "unaffected", "version": "9060020260504154614.9", "lessThan": "*", "versionType": "rpm"}], "packageName": "nginx:1.26", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:hummingbird:1"], "vendor": "Red Hat", "product": "Red Hat Hardened Images", "versions": [{"status": "unaffected", "version": "1.30.0-1.hum1", "lessThan": "*", "versionType": "rpm"}], "packageName": "nginx-main", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhui:5::el9"], "vendor": "Red Hat", "product": "Red Hat Update Infrastructure 5", "versions": [{"status": "unaffected", "version": "1776868774", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhui5/cds-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhui:5::el9"], "vendor": "Red Hat", "product": "Red Hat Update Infrastructure 5", "versions": [{"status": "unaffected", "version": "1776868842", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhui5/rhua-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}]}], "published": "2026-03-24T15:16:32.910", "references": [{"url": "https://my.f5.com/manage/s/article/K000160383", "tags": ["Vendor Advisory"], "source": "f5sirt@f5.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:10065", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:13634", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:13680", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:13839", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:14836", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:15942", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:15943", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:15945", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:15966", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:6906", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:6907", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:6923", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:7002", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:7343", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:8346", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/security/cve/CVE-2026-27651", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2450791", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27651.json", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "f5sirt@f5.com", "description": [{"lang": "en", "value": "CWE-476"}]}, {"type": "Secondary", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "When the ngx_mail_auth_http_module\u00a0module is enabled on NGINX Plus or NGINX Open Source, undisclosed requests can cause worker processes to terminate. This issue may occur when (1) CRAM-MD5 or APOP authentication is enabled, and (2) the authentication server permits retry by returning the Auth-Wait response header. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated."}, {"lang": "es", "value": "Cuando el m\u00f3dulo ngx_mail_auth_http_module est\u00e1 habilitado en NGINX Plus o NGINX Open Source, las solicitudes no reveladas pueden causar la terminaci\u00f3n de los procesos de trabajador. Este problema puede ocurrir cuando (1) la autenticaci\u00f3n CRAM-MD5 o APOP est\u00e1 habilitada, y (2) el servidor de autenticaci\u00f3n permite reintentar al devolver el encabezado de respuesta Auth-Wait. Nota: Las versiones de software que han alcanzado el Fin del Soporte T\u00e9cnico (EoTS) no son evaluadas."}], "lastModified": "2026-07-15T02:19:09.153", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "89573E06-4D65-4D4A-B9CD-7FD8AF637342", "versionEndIncluding": "0.9.7", "versionStartIncluding": "0.5.15"}, {"criteria": "cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0E8049B1-4C36-4711-BB99-2721CF67FF81", "versionEndExcluding": "1.28.3", "versionStartIncluding": "1.0.0"}, {"criteria": "cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C0EFE28B-E8E5-464E-B407-96436CA87C8E", "versionEndExcluding": "1.29.7", "versionStartIncluding": "1.29.0"}, {"criteria": "cpe:2.3:a:f5:nginx_plus:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E7600A88-7651-4D8E-A04A-3AA81C850CC5", "versionEndExcluding": "r35", "versionStartIncluding": "r33"}, {"criteria": "cpe:2.3:a:f5:nginx_plus:r32:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "36C4308E-651E-437C-84E7-10C542E3ADC2"}, {"criteria": "cpe:2.3:a:f5:nginx_plus:r32:p1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FA913184-EAAD-409E-99C6-AB979DAA93F3"}, {"criteria": "cpe:2.3:a:f5:nginx_plus:r32:p2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "782DF180-1101-4D6A-A1D7-8DADBAF6D9D3"}, {"criteria": "cpe:2.3:a:f5:nginx_plus:r32:p3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FB0B11F2-4748-492B-9906-F8C4C5EAFF12"}, {"criteria": "cpe:2.3:a:f5:nginx_plus:r32:p4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "86B53968-1CCA-4CF3-8454-BB92EF64D10E"}, {"criteria": "cpe:2.3:a:f5:nginx_plus:r35:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5D5FFD66-35C3-41AD-BD77-510E34A3AC6F"}, {"criteria": "cpe:2.3:a:f5:nginx_plus:r35:p1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4958360C-7993-4C82-8685-202D4940CE01"}, {"criteria": "cpe:2.3:a:f5:nginx_plus:r36:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E7E5F940-048A-446F-9A1E-074612CEA1AC"}, {"criteria": "cpe:2.3:a:f5:nginx_plus:r36:p1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7993A0FB-BE7E-4634-BF7F-FDEE3582D3E7"}, {"criteria": "cpe:2.3:a:f5:nginx_plus:r36:p2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "862EA47E-8D57-434E-9C8F-238325FB85B2"}], "operator": "OR"}]}], "sourceIdentifier": "f5sirt@f5.com"}