{"id":"CVE-2026-47843","state":"PUBLISHED","title":"Reactor Netty may incorrectly route traffic due to DNS resolver reuse","description":"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","publishedAt":"2026-08-26T19:22:24.697Z","updatedAt":"2026-08-26T19:45:10.489Z","severity":{"score":3.7,"label":"Low","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","source":"vmware"},"assigner":"vmware","products":["Spring Reactor Netty"],"affected":[{"vendor":"Spring","product":"Reactor Netty","defaultStatus":"unaffected","versions":[{"version":"1.3.0","status":"affected","lessThanOrEqual":"1.3.6","versionType":"custom"},{"version":"1.1.0","status":"affected","lessThanOrEqual":"1.2.18","versionType":"custom"},{"version":"0","status":"affected","lessThanOrEqual":"1.0.52","versionType":"custom"}]}],"references":["https://spring.io/security/cve-2026-47843"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/47xxx/CVE-2026-47843.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-47843","state":"PUBLISHED","datePublished":"2026-08-26T19:22:24.697Z","dateUpdated":"2026-08-26T19:45:10.489Z","assignerShortName":"vmware","assignerOrgId":"dcf2e128-44bd-42ed-91e8-88f912c1401d","dateReserved":"2026-05-20T10:00:51.004Z"},"containers":{"cna":{"title":"Reactor Netty may incorrectly route traffic due to DNS resolver reuse","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"}],"affected":[{"vendor":"Spring","product":"Reactor Netty","defaultStatus":"unaffected","versions":[{"version":"1.3.0","status":"affected","lessThanOrEqual":"1.3.6","versionType":"custom"},{"version":"1.1.0","status":"affected","lessThanOrEqual":"1.2.18","versionType":"custom"},{"version":"0","status":"affected","lessThanOrEqual":"1.0.52","versionType":"custom"}]}],"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"}}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-706 Use of Incorrectly-Resolved Name or Reference","type":"CWE"}]}],"providerMetadata":{"shortName":"vmware","orgId":"dcf2e128-44bd-42ed-91e8-88f912c1401d","dateUpdated":"2026-08-26T19:22:24.697Z"},"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."}]}],"source":{"discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-26T19:45:10.489Z"}}]}}}