{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-1642", "assignerOrgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab", "state": "PUBLISHED", "assignerShortName": "f5", "dateReserved": "2026-01-29T18:26:26.996Z", "datePublished": "2026-02-04T15:02:06.154Z", "dateUpdated": "2026-02-04T16:02:24.781Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unknown", "product": "NGINX Open Source", "vendor": "F5", "versions": [{"changes": [{"at": "1.28.2", "status": "unaffected"}], "lessThan": "1.29.5", "status": "affected", "version": "1.3.0", "versionType": "semver"}]}, {"defaultStatus": "unknown", "product": "NGINX Plus", "vendor": "F5", "versions": [{"lessThan": "R36 P2", "status": "affected", "version": "R36", "versionType": "custom"}, {"lessThan": "R35 P1", "status": "affected", "version": "R35", "versionType": "custom"}, {"lessThan": "*", "status": "affected", "version": "R34", "versionType": "custom"}, {"lessThan": "*", "status": "affected", "version": "R33", "versionType": "custom"}, {"lessThan": "R32 P4", "status": "affected", "version": "R32", "versionType": "custom"}]}], "credits": [{"lang": "en", "type": "finder", "value": "F5"}], "datePublic": "2026-02-04T15:00:00.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<span style=\"background-color: rgb(255, 255, 255);\">\n\n<span style=\"background-color: rgb(255, 255, 255);\">\n\n<span style=\"background-color: rgb(255, 255, 255);\">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.&nbsp;&nbsp;</span></span>Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.\n\n</span><br>"}], "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."}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}, {"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "baseScore": 8.2, "baseSeverity": "HIGH", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-349", "description": "CWE-349: Acceptance of Extraneous Untrusted Data With Trusted Data", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab", "shortName": "f5", "dateUpdated": "2026-02-04T15:02:06.154Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://my.f5.com/manage/s/article/K000159824"}], "source": {"discovery": "INTERNAL"}, "title": "NGINX vulnerability", "x_generator": {"engine": "F5 SIRTBot v1.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-02-04T16:01:47.913148Z", "id": "CVE-2026-1642", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-02-04T16:02:24.781Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-1642", "assignerOrgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab", "state": "PUBLISHED", "assignerShortName": "f5", "dateReserved": "2026-01-29T18:26:26.996Z", "datePublished": "2026-02-04T15:02:06.154Z", "dateUpdated": "2026-02-04T16:02:24.781Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unknown", "product": "NGINX Open Source", "vendor": "F5", "versions": [{"changes": [{"at": "1.28.2", "status": "unaffected"}], "lessThan": "1.29.5", "status": "affected", "version": "1.3.0", "versionType": "semver"}]}, {"defaultStatus": "unknown", "product": "NGINX Plus", "vendor": "F5", "versions": [{"lessThan": "R36 P2", "status": "affected", "version": "R36", "versionType": "custom"}, {"lessThan": "R35 P1", "status": "affected", "version": "R35", "versionType": "custom"}, {"lessThan": "*", "status": "affected", "version": "R34", "versionType": "custom"}, {"lessThan": "*", "status": "affected", "version": "R33", "versionType": "custom"}, {"lessThan": "R32 P4", "status": "affected", "version": "R32", "versionType": "custom"}]}], "credits": [{"lang": "en", "type": "finder", "value": "F5"}], "datePublic": "2026-02-04T15:00:00.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<span style=\"background-color: rgb(255, 255, 255);\">\n\n<span style=\"background-color: rgb(255, 255, 255);\">\n\n<span style=\"background-color: rgb(255, 255, 255);\">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.&nbsp;&nbsp;</span></span>Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.\n\n</span><br>"}], "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."}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}, {"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "baseScore": 8.2, "baseSeverity": "HIGH", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-349", "description": "CWE-349: Acceptance of Extraneous Untrusted Data With Trusted Data", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab", "shortName": "f5", "dateUpdated": "2026-02-04T15:02:06.154Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://my.f5.com/manage/s/article/K000159824"}], "source": {"discovery": "INTERNAL"}, "title": "NGINX vulnerability", "x_generator": {"engine": "F5 SIRTBot v1.0"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-1642", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-02-04T16:01:47.913148Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-02-04T16:02:17.994Z"}}]}}

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