CVE-2026-100353 Details
Description
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.
A denial-of-service vulnerability has been identified in Kin-OpenAPI versions 0.136.0 prior to 0.149.0. The issue arises in the OpenAPI 3.1 specification handling, where array schemas can legally omit the 'items' keyword. This omission creates a nil-pointer dereference during request validation, leading to a panic. The vulnerability can be triggered by an unauthenticated remote client through specific query parameters or request bodies that exploit this flaw.
Users should update to Kin-OpenAPI version 0.149.0, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 15, 2026CISA-ADP
Assessed Oct 29, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/getkin/kin-openapi/security/advisories/GHSA-vrcc-3ch7-hppw | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/getkin/kin-openapi/commit/9814d1f2b212f3508bf52296aa9e248b2122a5a9 | [email protected] | Source CodeVendor |
| https://github.com/getkin/kin-openapi/releases/tag/v0.149.0 | [email protected] | Release NotesVendor |
| https://github.com/getkin/kin-openapi/security/advisories/GHSA-vrcc-3ch7-hppw | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-476 | NULL Pointer Dereference | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| github.com/getkin/kin-openapi | >= 0.136.0, <= 0.144.0 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 29, 2026 | CVE Modified | CISA-ADP |
| Oct 15, 2026 | New CVE Received | [email protected] |