Resource exhaustion in Getkin Kin-Openapi
CVE-2026-100350
kin-openapi is a Go project for handling OpenAPI files. From 0.145.0 until 0.146.0, openapi3filter repeatedly calls regexp.MustCompile for the same parameter-name regular expression inside the per-query-key loop in urlValuesDecoder.DecodeObject used to decode a deepObject query parameter. An unauthenticated remote client can send an affected endpoint a request containing many unrelated query keys, causing ValidateRequest to perform work and allocations proportional to the attacker-controlled key count for every deepObject parameter. The expression itself is fixed and this is not regular expression denial of service; the resource consumption comes from loop-invariant recompilation. This issue is fixed in version 0.146.0.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Getkin Kin-Openapi — versions >= 0.145.0, < 0.146.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-100350?
- CVE-2026-100350 is a medium-severity vulnerability in Getkin Kin-Openapi, classified under Uncontrolled Resource Consumption. CVSS score: 5.3/10. Published 2026-10-15.
- How severe is CVE-2026-100350?
- Medium severity. CVSS v3 base score is 5.3 out of 10.