{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90439", "assignerOrgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab", "state": "PUBLISHED", "assignerShortName": "f5", "dateReserved": "2026-09-11T20:40:55.486Z", "datePublished": "2026-09-15T14:27:26.047Z", "dateUpdated": "2026-09-15T14:49:03.305Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unknown", "modules": ["ngx_http_v3_module"], "product": "NGINX Plus", "vendor": "F5", "versions": [{"lessThan": "37.1.1.1", "status": "affected", "version": "37.1.0.1", "versionType": "custom"}, {"lessThan": "37.0.6.1", "status": "affected", "version": "37.0.0.1", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "modules": ["ngx_http_v3_module"], "product": "NGINX Open Source", "vendor": "F5", "versions": [{"lessThan": "1.31.6", "status": "affected", "version": "1.29.2", "versionType": "semver"}, {"lessThan": "1.30.5", "status": "affected", "version": "1.30.4", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "reporter", "value": "F5 acknowledges Banny Liao for bringing this issue to our attention and following the highest standards of coordinated disclosure."}], "datePublic": "2026-09-15T14:00:00.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_v3_module module. When using HTTP/3 with OpenSSL versions &lt;= OpenSSL 3.5.0 under certain configurations, a limited heap buffer overflow could happen while processing a TLS handshake. This can happen in a non-deterministic manner that is beyond the attacker's control.&nbsp;This may cause a heap buffer overflow in the NGINX worker process leading to a restart and/or limited data corruption.<br><br>Impact:<br>This vulnerability may allow remote attackers to cause a denial-of-service (DoS) on the NGINX system or limited data corruption. There is no control plane exposure; this is a data plane issue only.<br><br>\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_v3_module module. When using HTTP/3 with OpenSSL versions <= OpenSSL 3.5.0 under certain configurations, a limited heap buffer overflow could happen while processing a TLS handshake. This can happen in a non-deterministic manner that is beyond the attacker's control.\u00a0This may cause a heap buffer overflow in the NGINX worker process leading to a restart and/or limited data corruption.\n\nImpact:\nThis vulnerability may allow remote attackers to cause a denial-of-service (DoS) on the NGINX system or limited data corruption. 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-100", "descriptions": [{"lang": "en", "value": "CAPEC-100 Overflow Buffers"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}, {"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 6.9, "baseSeverity": "MEDIUM", "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:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-122", "description": "CWE-122 Heap-based Buffer Overflow", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab", "shortName": "f5", "dateUpdated": "2026-09-15T14:27:26.047Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://my.f5.com/manage/s/article/K000162604"}], "source": {"discovery": "EXTERNAL"}, "title": "NGINX ngx_http_v3_module vulnerability", "workarounds": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "Disable HTTP/3 by removing \"quic\" from the \"listen\" directive. <br>Alternatively, enable HTTP/3 by adding \"quic\" to all configured server blocks.<br><br>"}], "value": "Disable HTTP/3 by removing \"quic\" from the \"listen\" directive. \nAlternatively, enable HTTP/3 by adding \"quic\" to all configured server blocks."}], "x_generator": {"engine": "F5 SIRTBot v1.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-15T14:48:56.965070Z", "id": "CVE-2026-90439", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"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": "2026-09-15T14:49:03.305Z"}}]}}

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