Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/getkin/kin-openapi/commit/1d0a337c9b1570fab283be8a04c8af6e43b
- https://github.com/getkin/kin-openapi/releases/tag/v0.141.0
- https://github.com/getkin/kin-openapi/security/advisories/GHSA-mmfr-pmjx-hw9w
FAQ
What is CVE-2026-76905?
CVE-2026-76905 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 ch...
How severe is CVE-2026-76905?
CVE-2026-76905 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-76905?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.