CVE-2026-97394 · GHSA-p6wj-qrr4-pgh5

kin-openapi: Nil-pointer dereference panic in openapi3filter for OpenAPI 3.1 array schemas missing items

Risk score: 62/100
CVSS: 7.5 v3.1
Exploit chance (30 days): 0.4%
Published: 15 Oct 2026

Open in the live forecast Today's forecast

What to know

What it 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 ot…
Affected: github.com/getkin/kin-openapi (go) >= 0.136.0, < 0.143.0
Fix: Upgrade github.com/getkin/kin-openapi to 0.143.0 or later.
Exploitation: No known exploitation

Why it is Amber

CVSS 7.5 high
Remotely exploitable without logging in
On your watchlist: Go

Affected packages

Package	Ecosystem	Vulnerable	Fixed in
github.com/getkin/kin-openapi	go	>= 0.136.0, < 0.143.0	0.143.0

References

Original description

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.

Last activity 15 Oct 2026. Patch Forecast updates every hour.