CVE-2026-1642

{"id": "CVE-2026-1642", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "f5sirt@f5.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.2}], "cvssMetricV40": [{"type": "Secondary", "source": "f5sirt@f5.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.2, "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:N/VI:H/VA:N/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": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "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"}}]}, "published": "2026-02-04T15:16:14.190", "references": [{"url": "https://my.f5.com/manage/s/article/K000159824", "tags": ["Vendor Advisory"], "source": "f5sirt@f5.com"}, {"url": "http://www.openwall.com/lists/oss-security/2026/02/05/1", "tags": ["Mailing List", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "f5sirt@f5.com", "description": [{"lang": "en", "value": "CWE-349"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-345"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability exists in NGINX OSS and NGINX Plus when configured to proxy to upstream Transport Layer Security (TLS) servers. An attacker with a man-in-the-middle (MITM) position on the upstream server side\u2014along with conditions beyond the attacker's control\u2014may be able to inject plain text data into the response from an upstream proxied server.\u00a0\u00a0Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated."}], "lastModified": "2026-02-13T21:35:01.730", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AE3A85CC-50DD-4BE7-A8BF-F2AA2744FCDB", "versionEndIncluding": "1.6.2", "versionStartIncluding": "1.2.0"}, {"criteria": "cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "95483FC6-1850-4C56-95C6-D65AEF39C5E4", "versionEndExcluding": "2.4.1", "versionStartIncluding": "2.0.0"}, {"criteria": "cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "53459EB1-5EAE-4F38-86CC-303408A91124", "versionEndIncluding": "3.7.2", "versionStartIncluding": "3.4.0"}, {"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": "48DC8DC2-497F-48F9-A68B-8EA8DAA507E0", "versionEndExcluding": "5.3.3", "versionStartIncluding": "5.0.0"}, {"criteria": "cpe:2.3:a:f5:nginx_instance_manager:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "05880D9D-7C68-42A8-9374-8BF4E6403757", "versionEndIncluding": "2.21.0", "versionStartIncluding": "2.15.1"}, {"criteria": "cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "156F74E8-589F-43FC-AD64-74E2BFD11A62", "versionEndExcluding": "1.28.2", "versionStartIncluding": "1.3.0"}, {"criteria": "cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6205FEE4-C23C-4FBA-953D-35E8B8644D64", "versionEndExcluding": "1.29.5", "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:r33:p1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "46DC49B8-7286-4867-9CDA-1C1B469CD304"}, {"criteria": "cpe:2.3:a:f5:nginx_plus:r33:p2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "43477C2E-7485-4146-B25C-F58D632CD85B"}, {"criteria": "cpe:2.3:a:f5:nginx_plus:r33:p3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6A25B9CF-02C0-42DE-9C70-F2AD3ACE3CEB"}, {"criteria": "cpe:2.3:a:f5:nginx_plus:r34:p1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7453D683-FCA7-46EE-BE49-5FD9A01D7F87"}, {"criteria": "cpe:2.3:a:f5:nginx_plus:r34:p2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A977BF9F-D165-4B93-B4D2-A177883A5E75"}, {"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: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"}], "operator": "OR"}]}], "sourceIdentifier": "f5sirt@f5.com"}