CVE-2026-100348: medium-severity vulnerability in getkin kin-openapi
kin-openapi spec loader panics on a self-referential additionalProperties $ref (nil-pointer DoS)
Published
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 0.4%
kin-openapi is a Go project for handling OpenAPI files. Prior to 0.145.0, openapi3.Loader can dereference a nil SchemaRef.Value while resolving a self-referential additionalProperties JSON Reference such as a schema that points to its own additionalProperties member. Loading an attacker-controlled OpenAPI document through LoadFromData, LoadFromFile, or LoadFromURI reaches resolveComponent before document validation and can panic the loading process. Resolved additionalProperties schemas and ordinary recursive schemas do not take the vulnerable nil-value path. This issue is fixed in version 0.145.0.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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%