Excessive Platform Resource Consumption within a Loop in kin-openapi - #VU140830
Published: August 3, 2026
Vulnerability identifier: #VU140830
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-1050
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 excessive platform resource consumption within a loop in openapi3filter/urlValuesDecoder.DecodeObject when processing deepObject-style query parameters during request validation. A remote attacker can send a specially crafted request with many query keys to cause a denial of service.
Only operations with at least one query parameter using the deepObject style are vulnerable, and the resource consumption occurs before any application handler runs.
Affected software
kin-openapi
Remediation
Install security update from vendor's website.
kin-openapi - update to 0.146.0