NULL pointer dereference in kin-openapi - #VU146055
Published: August 28, 2026
Vulnerability identifier: #VU146055
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to null pointer dereference in openapi3filter request validation when processing crafted OpenAPI 3.1 array parameters or URL-encoded body data with a schema that omits the items keyword. A remote attacker can send a specially crafted request to cause a denial of service.
The issue is triggered by query parameters, deepObject query parameters, or URL-encoded request bodies that reach unguarded array decoding paths.
Affected software
kin-openapi
Remediation
Install security update from vendor's website.
kin-openapi - update to 0.149.0