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CVE-2026-114437

Chi Client IP Spoofing in ClientIPFromXFF via X-Forwarded-For PUBLISHED

Description (CNA)

In the Golang Chi web framework, the ClientIPFromXFF middleware skips any X-Forwarded-For entry in a configured trusted CIDR but never verifies that the direct TCP peer in http.Request.RemoteAddr belongs to that CIDR. A client that can reach the Go server directly can therefore append a trusted-looking proxy address and choose the client IP returned by middleware.GetClientIP. This issue affects chi before 5.4.0.

Affected (CNA)

Vendor / productVersions
go-chi / chiaffected 0 before 5.4.0

CWE

CWE-348

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.