Input validation error in kin-openapi - #VU140576
Published: July 30, 2026
Vulnerability identifier: #VU140576
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-20
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 improper input validation in the openapi3filter legacy router when handling requests to an existing static path with a non-canonical or unsupported HTTP method. A remote attacker can send a specially crafted request to cause a denial of service.
The panic occurs during route resolution before authentication runs, and exploitation requires the target path to be an exact static path defined in the served specification.
Affected software
kin-openapi
Remediation
Install security update from vendor's website.
kin-openapi - update to 0.145.0