CVE-2026-100354: high-severity vulnerability in getkin kin-openapi
kin-openapi: Uncontrolled Recursion on Circular allOf/anyOf/oneOf Schemas Causes Fatal Process Crash
Published
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.4%
kin-openapi is a Go project for handling OpenAPI files. Prior to 0.149.0, runtime request, response, and direct schema validation lacks cycle detection when an allOf, anyOf, or oneOf chain refers back to an ancestor schema, even though loading and document validation accept the circular reference. A request or response that reaches the affected schema causes unbounded recursion in Schema.visitJSON or openapi3filter.decodeValue and exhausts the Go goroutine stack. The resulting fatal stack overflow cannot be caught with recover and terminates the entire process, including unrelated requests. This issue is fixed in version 0.149.0.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
getkin · kin-openapiRelated CVEs — getkin kin-openapi
In the same product, most dangerous first.
CVE-2025-30153HIGHImproper Handling of Highly Compressed Data (Data Amplification) in github.com/getkin/kin-openapi/openapi3filterEPSS 0.6%CVE-2026-97394HIGHkin-openapi: Nil-pointer dereference panic in openapi3filter for OpenAPI 3.1 array schemas missing itemsEPSS 0.6%CVE-2026-76905HIGHkin-openapi openai3filter: nil-pointer panic in ConvertErrors on malformed multipart/form-data body enables unauthenticated DoSEPSS 0.6%CVE-2026-100352HIGHkin-openapi: YAML NaN/Inf Values Bypass Built-in Guards and Panic via OAS 3.1 Validation PathEPSS 0.6%CVE-2026-77354HIGHkin-openapi: Uncontrolled resource consumption in openapi3filter deepObject query parameter decodingEPSS 0.5%CVE-2026-100347MEDIUMkin-openapi: Unauthenticated panic (DoS) in openapi3filter legacy router via non-canonical/unsupported HTTP method on a static pathEPSS 0.5%