EUVD-2026-66819
GHSA-c599-m66r-v62w
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Network-reachable with no auth, but HAProxy Protocol config is a deployment prereq; integrity-only impact from IP spoofing, no confidentiality or availability loss.
Primary rating from Vendor (vmware).
CVSS VectorVendor: vmware
Lifecycle Timeline
2DescriptionCVE.org
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
AnalysisAI
Reactor Netty HTTP Server incorrectly evaluates the remote client IP address in deployments where HAProxy PROXY Protocol support is enabled, potentially allowing network attackers to spoof their apparent source IP. Affected versions span the 1.0.x, 1.1.x/1.2.x, and 1.3.x branches. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the target Reactor Netty HTTP Server application has explicitly enabled HAProxy PROXY Protocol parsing in its configuration - this is not the default behavior. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 5.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N) correctly frames this as a moderate-severity, network-reachable integrity issue. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Consult the VMware Spring security advisory at https://spring.io/security/cve-2026-47845 for exact fixed versions, which are not enumerated in the currently available intelligence. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-290 – Authentication Bypass by Spoofing
View allSame technique Authentication Bypass
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External POC / Exploit Code
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