CVE-2026-114437

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Source
https://cve.org/CVERecord?id=CVE-2026-114437
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-114437.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-114437
Aliases
  • GHSA-j6qf-3m9c-vwj3
Downstream
Published
2026-10-21T13:52:25Z
Modified
2026-10-22T02:48:52Z
Severity
  • 6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Chi Client IP Spoofing in ClientIPFromXFF via X-Forwarded-For
Details

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.

Database specific 
{
    "cna_assigner":  "tenable",
    "cwe_ids":  [
        "CWE-348"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/114xxx/CVE-2026-114437.json"
}
References

Affected packages

Git / github.com/go-chi/chi

Affected ranges

Type
GIT
Repo
https://github.com/go-chi/chi
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
7f9b7448f51d28804fac98c0a17bc2a7cec1079f
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "5.4.0"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandardRange"
        }
    ]
}

Affected versions

v0.*
v0.9.0
v1.*
v1.0.0
v1.5.1
v1.5.2
v1.5.3
v1.5.4
v2.*
v2.0.0
v2.1.0
v3.*
v3.0.0
v3.1.0
v3.1.1
v3.1.2
v3.1.3
v3.1.4
v3.1.5
v3.2.0
v3.2.1
v3.3.0
v3.3.1
v3.3.2
v3.3.3
v3.3.4
v4.*
v4.0.0
v4.0.1
v4.0.2
v4.0.3
v4.0.4
v4.1.0
v4.1.1
v4.1.2
v5.*
v5.0.0
v5.0.1
v5.0.10
v5.0.11
v5.0.12
v5.0.13
v5.0.14
v5.0.2
v5.0.3
v5.0.4
v5.0.5
v5.0.6
v5.0.7
v5.0.8
v5.0.9
v5.1.0
v5.2.0
v5.2.1
v5.2.2
v5.2.3
v5.2.4
v5.2.5
v5.3.0
v5.3.1
v5.3.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-114437.json"