CVE-2026-47843

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-47843", "assignerOrgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d", "state": "PUBLISHED", "assignerShortName": "vmware", "dateReserved": "2026-05-20T10:00:51.004Z", "datePublished": "2026-08-26T19:22:24.697Z", "dateUpdated": "2026-08-26T19:45:10.489Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d", "shortName": "vmware", "dateUpdated": "2026-08-26T19:22:24.697Z"}, "title": "Reactor Netty may incorrectly route traffic due to DNS resolver reuse", "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-706 Use of Incorrectly-Resolved Name or Reference", "type": "CWE"}]}], "impacts": [{"descriptions": [{"lang": "en", "value": "In specific scenarios involving multiple clients with different DNS resolver configurations, Reactor Netty may incorrectly reuse a previously configured DNS resolver."}]}], "affected": [{"vendor": "Spring", "product": "Reactor Netty", "versions": [{"status": "affected", "version": "1.3.0", "lessThanOrEqual": "1.3.6", "versionType": "custom"}, {"status": "affected", "version": "1.1.0", "lessThanOrEqual": "1.2.18", "versionType": "custom"}, {"status": "affected", "version": "0", "lessThanOrEqual": "1.0.52", "versionType": "custom"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "In specific scenarios involving multiple clients with different DNS resolver configurations, Reactor Netty may incorrectly reuse a previously configured DNS resolver.\nReactor Netty 1.3.0 - 1.3.6\nReactor Netty 1.1.0 - 1.2.18\nReactor Netty 1.0.52 and earlier", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>In specific scenarios involving multiple clients with different DNS resolver configurations, Reactor Netty may incorrectly reuse a previously configured DNS resolver.</p><p>Reactor Netty 1.3.0 - 1.3.6<br/>Reactor Netty 1.1.0 - 1.2.18<br/>Reactor Netty 1.0.52 and earlier</p>"}]}], "references": [{"url": "https://spring.io/security/cve-2026-47843"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N", "baseScore": 3.7, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}}], "source": {"discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-26T19:31:55.895962Z", "id": "CVE-2026-47843", "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": "2026-08-26T19:45:10.489Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-47843", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-26T19:31:55.895962Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-26T19:45:03.237Z"}}], "cna": {"title": "Reactor Netty may incorrectly route traffic due to DNS resolver reuse", "source": {"discovery": "UNKNOWN"}, "impacts": [{"descriptions": [{"lang": "en", "value": "In specific scenarios involving multiple clients with different DNS resolver configurations, Reactor Netty may incorrectly reuse a previously configured DNS resolver."}]}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 3.7, "attackVector": "NETWORK", "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Spring", "product": "Reactor Netty", "versions": [{"status": "affected", "version": "1.3.0", "versionType": "custom", "lessThanOrEqual": "1.3.6"}, {"status": "affected", "version": "1.1.0", "versionType": "custom", "lessThanOrEqual": "1.2.18"}, {"status": "affected", "version": "0", "versionType": "custom", "lessThanOrEqual": "1.0.52"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://spring.io/security/cve-2026-47843"}], "descriptions": [{"lang": "en", "value": "In specific scenarios involving multiple clients with different DNS resolver configurations, Reactor Netty may incorrectly reuse a previously configured DNS resolver.\nReactor Netty 1.3.0 - 1.3.6\nReactor Netty 1.1.0 - 1.2.18\nReactor Netty 1.0.52 and earlier", "supportingMedia": [{"type": "text/html", "value": "<p>In specific scenarios involving multiple clients with different DNS resolver configurations, Reactor Netty may incorrectly reuse a previously configured DNS resolver.</p><p>Reactor Netty 1.3.0 - 1.3.6<br/>Reactor Netty 1.1.0 - 1.2.18<br/>Reactor Netty 1.0.52 and earlier</p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "description": "CWE-706 Use of Incorrectly-Resolved Name or Reference"}]}], "providerMetadata": {"orgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d", "shortName": "vmware", "dateUpdated": "2026-08-26T19:22:24.697Z"}}}, "cveMetadata": {"cveId": "CVE-2026-47843", "state": "PUBLISHED", "dateUpdated": "2026-08-26T19:45:10.489Z", "dateReserved": "2026-05-20T10:00:51.004Z", "assignerOrgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d", "datePublished": "2026-08-26T19:22:24.697Z", "assignerShortName": "vmware"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Reactor Netty", "vendor": "Spring", "versions": [{"lessThanOrEqual": "1.3.6", "status": "affected", "version": "1.3.0", "versionType": "custom"}, {"lessThanOrEqual": "1.2.18", "status": "affected", "version": "1.1.0", "versionType": "custom"}, {"lessThanOrEqual": "1.0.52", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "security@vmware.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:broadcom:reactor_netty:*:*:*:*:*:*:*:*", "matchCriteriaId": "DE1D5A2A-4549-41CA-A119-9E376FFFEA5D", "versionEndExcluding": "1.0.53", "vulnerable": true}, {"criteria": "cpe:2.3:a:broadcom:reactor_netty:*:*:*:*:*:*:*:*", "matchCriteriaId": "35B4D929-53C7-4B17-83B2-79976CF8CC26", "versionEndExcluding": "1.2.19", "versionStartIncluding": "1.1.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:broadcom:reactor_netty:*:*:*:*:*:*:*:*", "matchCriteriaId": "393A111C-DE4E-4182-87E3-66854B053681", "versionEndExcluding": "1.3.6.1", "versionStartIncluding": "1.3.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In specific scenarios involving multiple clients with different DNS resolver configurations, Reactor Netty may incorrectly reuse a previously configured DNS resolver.\nReactor Netty 1.3.0 - 1.3.6\nReactor Netty 1.1.0 - 1.2.18\nReactor Netty 1.0.52 and earlier"}], "id": "CVE-2026-47843", "lastModified": "2026-09-04T19:11:22.780", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 1.4, "source": "security@vmware.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-47843", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-26T19:31:55.895962Z", "version": "2.0.3"}}]}, "published": "2026-08-26T20:17:26.193", "references": [{"source": "security@vmware.com", "tags": ["Vendor Advisory"], "url": "https://spring.io/security/cve-2026-47843"}], "sourceIdentifier": "security@vmware.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.3.0,1.3.6]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.1.0,1.2.18]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,1.0.52]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Reactor Netty", "source": "cna", "vendor": "Spring"}, "product": "reactor_netty", "vendor": "spring"}], "created": "2026-08-26T20:45:03.620061+00:00", "updated": "2026-09-05T00:30:18.583128+00:00", "vendors": ["spring", "spring$PRODUCT$reactor_netty"], "weaknesses": ["CWE-665"]}