CVE-2026-76905
Description
kin-openapi is a Go project for handling OpenAPI files. From 0.10.0 until 0.141.0, openapi3filter.convertParseError in openapi3filter/validation_error_encoder.go dereferences e.Parameter.In without checking whether e.Parameter is nil. A malformed non-string scalar field in a multipart/form-data request body produces a nested ParseError with a nil RequestError.Parameter, and applications that render the validation error through openapi3filter.ConvertErrors or ValidationErrorEncoder panic. An unauthenticated client can repeatedly send such requests to deny service when the application lacks a recovery boundary. JSON request bodies and applications that do not use these error-rendering helpers are not affected. This issue is fixed in version 0.141.0.
How to fix
- github.com/getkin/kin-openapi0.141.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| github.com/getkin/kin-openapiGo | 0.10.0 ≤ v < 0.141.0 | 0.141.0 |
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