Low severity · published Aug 26, 2026
CVE-2026-47843
Reactor Netty may incorrectly route traffic due to DNS resolver reuse
3.7
CVSS
0.3%
EPSS
No
On KEV
Description
In 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
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RN
Reactor Netty · Spring
1.3.0 through 1.3.6; 1.1.0 through 1.2.18; through 1.0.52 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-47843
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-47843
Vendor Advisory
https://spring.io/security/cve-2026-47843
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