{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-47874", "assignerOrgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d", "state": "PUBLISHED", "assignerShortName": "vmware", "dateReserved": "2026-05-20T10:00:57.077Z", "datePublished": "2026-08-26T23:49:26.907Z", "dateUpdated": "2026-08-26T23:49:26.907Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d", "shortName": "vmware", "dateUpdated": "2026-08-26T23:49:26.907Z"}, "title": "Reactor Netty HTTP Server Denial of Service With Pipelined Requests", "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-770 Allocation of Resources Without Limits or Throttling", "type": "CWE"}]}], "impacts": [{"descriptions": [{"lang": "en", "value": "The vulnerability occurs when a client sends HTTP/1.1 pipelined requests over a single connection, causing the Reactor Netty HTTP server to consume an excessive amount of memory."}]}], "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": "The vulnerability occurs when a client sends HTTP/1.1 pipelined requests over a single connection, causing the Reactor Netty HTTP server to consume an excessive amount of memory.\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>The vulnerability occurs when a client sends HTTP/1.1 pipelined requests over a single connection, causing the Reactor Netty HTTP server to consume an excessive amount of memory.</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-2026-47874"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW"}}], "source": {"discovery": "UNKNOWN"}}}}

{}

{"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"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The vulnerability occurs when a client sends HTTP/1.1 pipelined requests over a single connection, causing the Reactor Netty HTTP server to consume an excessive amount of memory.\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-2026-47874", "lastModified": "2026-08-27T01:17:33.620", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security@vmware.com", "type": "Secondary"}]}, "published": "2026-08-27T01:17:33.620", "references": [{"source": "security@vmware.com", "url": "https://spring.io/security/cve-2026-47874"}], "sourceIdentifier": "security@vmware.com", "vulnStatus": "Received"}

{}

{"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": "2026-08-27T01:30:13.935233+00:00", "updated": "2026-08-27T02:00:14.650025+00:00", "vendors": ["spring", "spring$PRODUCT$reactor_netty"], "weaknesses": ["CWE-400"]}