Bug 2521202 (CVE-2026-76905) - CVE-2026-76905 github.com/getkin/kin-openapi: kin-openapi: Denial of Service via malformed multipart/form-data body
Summary: CVE-2026-76905 github.com/getkin/kin-openapi: kin-openapi: Denial of Service ...
Keywords:
Status: NEW
Alias: CVE-2026-76905
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-21 21:01 UTC by OSIDB Bzimport
Modified: 2026-09-09 20:08 UTC (History)
71 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-08-21 21:01:45 UTC
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.


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