NULL pointer dereference in kin-openapi - #VU140572
Published: July 30, 2026
Vulnerability identifier: #VU140572
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 and response decoders when processing OpenAPI 3.1 array schemas that omit items. A remote attacker can send a specially crafted request to cause a denial of service.
Only OpenAPI 3.1 documents are affected. The issue can be triggered through application/x-www-form-urlencoded and multipart/form-data request bodies, as well as array-typed response headers and other parseArray surfaces. User interaction is not required.
Affected software
kin-openapi
Remediation
Install security update from vendor's website.
kin-openapi - update to 0.143.0