Reactor Netty may incorrectly route traffic due to DNS resolver reuse

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-47843
StatePUBLISHED
Assignervmware
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-26 20:17:26 UTC
Updated2026-09-04 19:11:22 UTC
DescriptionIn specific scenarios involving multiple clients with different DNS resolver configurations, Reactor Netty may incorrectly reuse a previously configured DNS resolver. Reactor Netty 1.3.0 - 1.3.6 Reactor Netty 1.1.0 - 1.2.18 Reactor Netty 1.0.52 and earlier

Risk And Classification

Primary CVSS: v3.1 3.7 LOW from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS: 0.001660000 probability, percentile 0.060720000 (date 2026-08-30)

Problem Types: NVD-CWE-noinfo | CWE-706 Use of Incorrectly-Resolved Name or Reference

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
3.1CNACVSS3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Broadcom Reactor Netty All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Spring Reactor Netty affected 1.3.0 1.3.6 custom Not specified
CNA Spring Reactor Netty affected 1.1.0 1.2.18 custom Not specified
CNA Spring Reactor Netty affected 1.0.52 custom Not specified

References

ReferenceSourceLinkTags
spring.io/security/cve-2026-47843 [email protected] spring.io Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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