NULL pointer dereference in kin-openapi - #VU140575
Published: July 30, 2026
Vulnerability identifier: #VU140575
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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 a nil-pointer dereference in the openapi3 spec loader when parsing a crafted self-referential additionalProperties $ref in an OpenAPI document. A remote attacker can submit a specially crafted OpenAPI specification to cause a denial of service.
The issue is triggered during spec loading before validation.
Affected software
kin-openapi
Remediation
Install security update from vendor's website.
kin-openapi - update to 0.145.0