getkin kin-openapi up to 0.142.x OpenAPI Filter ValidateRequest/ValidateResponse null pointer dereference

Summaryinfo

A vulnerability identified as problematic has been detected in getkin kin-openapi up to 0.142.x. This vulnerability affects the function ValidateRequest/ValidateResponse of the component OpenAPI Filter. This manipulation causes null pointer dereference. The identification of this vulnerability is CVE-2026-97394. It is possible to initiate the attack remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in getkin kin-openapi up to 0.142.x and classified as problematic. Affected by this vulnerability is the function ValidateRequest/ValidateResponse of the component OpenAPI Filter. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. The summary by CVE is:

kin-openapi is a Go project for handling OpenAPI files. From 0.136.0 until 0.143.0, openapi3filter accepts OpenAPI 3.1 array schemas without an items keyword and then dereferences the nil Schema.Items value while decoding application/x-www-form-urlencoded or multipart/form-data request bodies, response headers, and other array parameter surfaces. A remote unauthenticated client can reach an affected operation with a nonempty request or matching response and deterministically trigger a nil-pointer panic during ValidateRequest or ValidateResponse. OpenAPI 3.0 documents are not affected because document validation rejects arrays without items, and JSON request bodies use a different decoder path. This issue is fixed in version 0.143.0.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-97394 since 09/24/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

Upgrading to version 0.143.0 eliminates this vulnerability.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• getkin

Name

• kin-openapi

Version

• 0.142

Website

• Product: https://github.com/getkin/kin-openapi/

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion