Medium severity · published Aug 26, 2026
CVE-2026-47845
Reactor Netty HTTP Server may incorrectly evaluate proxy addresses
5.3
CVSS
0.3%
EPSS
No
On KEV
Description
In specific scenarios, Reactor Netty HTTP Server may incorrectly evaluate the remote IP address when HAProxy Protocol is enabled. In order for this to happen, the application must be configured to use HAProxy Protocol.
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:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
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 22% 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-2026-47845
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-47845
Vendor Advisory
https://spring.io/security/cve-2026-47845
More from Reactor Netty
6.1
CVE-2026-47848
Reactor Netty WebSocket Client Leaks Credentials On Redirect
6.1
CVE-2026-41715
Reactor Netty HTTP Client Leaks Credentials On Protocol Downgrade Redirect
5.3
CVE-2026-47874
Reactor Netty HTTP Server Denial of Service With Pipelined Requests
3.7
CVE-2026-47844
Reactor Netty HTTP Server Leaks Exception Details
3.7
CVE-2026-47843
Reactor Netty may incorrectly route traffic due to DNS resolver reuse