Uncontrolled Recursion in kin-openapi - #VU146054
Published: August 28, 2026
Vulnerability identifier: #VU146054
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-674
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 uncontrolled recursion in runtime request and response validation handlers when processing circular allOf/anyOf/oneOf schema references. A remote attacker can send a request or supply a crafted schema to trigger a fatal process crash and cause a denial of service.
The issue results in an unrecoverable Go stack overflow that terminates the entire process, including unrelated goroutines.
Affected software
kin-openapi
Remediation
Install security update from vendor's website.
kin-openapi - update to 0.149.0