CVE-2026-73501

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Source
https://cve.org/CVERecord?id=CVE-2026-73501
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-73501.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-73501
Aliases
Downstream
Related
Published
2026-08-12T21:23:40Z
Modified
2026-09-05T18:26:41Z
Severity
  • 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
Summary
kin-openapi: ValidationHandler.Load() Fail-Open Authentication Bypass via NoopAuthenticationFunc Default
Details

kin-openapi is a Go project for handling OpenAPI files. Prior to 0.144.0, ValidationHandler.Load() in openapi3filter/validation_handler.go silently replaces a nil AuthenticationFunc with NoopAuthenticationFunc, which returns nil without checking credentials. This substitution causes every OpenAPI security requirement to be satisfied for unauthenticated requests when an application relies on ValidationHandler as its enforcement middleware. The no-op callback prevents the fail-closed ErrAuthenticationServiceMissing path from being reached and forwards the request to protected handlers that may require an API key, OAuth token, or another security scheme. This issue is fixed in version 0.144.0.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-287"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73501.json"
}
References

Affected packages

Git / github.com/getkin/kin-openapi

Affected ranges

Type
GIT
Repo
https://github.com/getkin/kin-openapi
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
f0407d53b0730280266f454b755010e7eeb985da
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.144.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v0.*
v0.1.0
v0.10.0
v0.100.0
v0.101.0
v0.102.0
v0.103.0
v0.104.0
v0.105.0
v0.106.0
v0.107.0
v0.108.0
v0.109.0
v0.11.0
v0.110.0
v0.111.0
v0.112.0
v0.113.0
v0.114.0
v0.115.0
v0.116.0
v0.117.0
v0.118.0
v0.119.0
v0.12.0
v0.120.0
v0.121.0
v0.122.0
v0.123.0
v0.124.0
v0.125.0
v0.126.0
v0.127.0
v0.128.0
v0.129.0
v0.13.0
v0.130.0
v0.131.0
v0.132.0
v0.133.0
v0.134.0
v0.135.0
v0.136.0
v0.137.0
v0.138.0
v0.139.0
v0.14.0
v0.140.0
v0.141.0
v0.142.0
v0.143.0
v0.15.0
v0.16.0
v0.17.0
v0.18.0
v0.19.0
v0.2.0
v0.20.0
v0.21.0
v0.22.0
v0.22.1
v0.23.0
v0.24.0
v0.25.0
v0.26.0
v0.27.0
v0.28.0
v0.29.0
v0.3.0
v0.3.1
v0.30.0
v0.31.0
v0.32.0
v0.33.0
v0.34.0
v0.35.0
v0.36.0
v0.37.0
v0.38.0
v0.39.0
v0.4.0
v0.40.0
v0.41.0
v0.42.0
v0.43.0
v0.44.0
v0.45.0
v0.45.1
v0.46.0
v0.47.0
v0.48.0
v0.49.0
v0.5.0
v0.5.1
v0.50.0
v0.51.0
v0.52.0
v0.53.0
v0.54.0
v0.55.0
v0.56.0
v0.57.0
v0.58.0
v0.59.0
v0.6.0
v0.60.0
v0.61.0
v0.62.0
v0.63.0
v0.64.0
v0.65.0
v0.66.0
v0.67.0
v0.68.0
v0.69.0
v0.7.0
v0.70.0
v0.71.0
v0.72.0
v0.73.0
v0.74.0
v0.75.0
v0.76.0
v0.77.0
v0.78.0
v0.79.0
v0.8.0
v0.80.0
v0.81.0
v0.82.0
v0.83.0
v0.84.0
v0.85.0
v0.86.0
v0.87.0
v0.88.0
v0.89.0
v0.9.0
v0.90.0
v0.91.0
v0.92.0
v0.93.0
v0.94.0
v0.95.0
v0.96.0
v0.97.0
v0.98.0
v0.99.0

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-73501.json"