CVE-2026-76905: Getkin Kin-Openapi

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

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.

Affected products

• Getkin Kin-Openapi: from 0.10.0, before 0.141.0 (fixed in 0.141.0)

Published 2026-08-21. Last modified 2026-09-09.