CVE-2026-100353: high-severity vulnerability in getkin kin-openapi
kin-openapi: Incomplete Fix for GHSA-p6wj-qrr4-pgh5: Three Unpatched nil-Items Panic Paths in openapi3filter
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.3%
kin-openapi is a Go project for handling OpenAPI files. From 0.136.0 until 0.149.0, three openapi3filter decoder paths that were missed by the fix for GHSA-p6wj-qrr4-pgh5 lack a nil-items guard for legal OpenAPI 3.1 array schemas. An unauthenticated remote client can trigger a deterministic nil-pointer panic through an array query parameter, a deepObject query parameter containing an array property, or an application/x-www-form-urlencoded request body whose array property appears inside an allOf, anyOf, or oneOf subschema. The query and composed-body paths reach urlValuesDecoder.parseArray, while the deepObject path reaches buildResObj, and all pass a nil items schema into code that dereferences it. 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%