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.
Metrics
Affected Vendors & Products
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History
Thu, 13 Aug 2026 13:30:00 +0000
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ssvc
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Thu, 13 Aug 2026 10:15:00 +0000
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Getkin
Getkin kin-openapi |
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Getkin
Getkin kin-openapi |
Wed, 12 Aug 2026 21:45:00 +0000
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| Description | 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. | |
| Title | kin-openapi: ValidationHandler.Load() Fail-Open Authentication Bypass via NoopAuthenticationFunc Default | |
| Weaknesses | CWE-287 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-08-12T21:23:40.623Z
Updated: 2026-08-13T13:06:36.863Z
Reserved: 2026-08-12T19:00:33.736Z
Link: CVE-2026-73501
Updated: 2026-08-13T13:06:23.209Z
Status : Received
Published: 2026-08-12T22:17:17.443
Modified: 2026-08-13T13:19:18.350
Link: CVE-2026-73501
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