CVE-2026-100347
mediumkin-openapi is a Go project for handling OpenAPI files.
kin-openapi is a Go project for handling OpenAPI files. Prior to 0.145.0, openapi3filter.ValidationHandler uses the routers/legacy router, which passes an unsupported or non-canonical HTTP method for an existing static path to openapi3.PathItem.GetOperation. The default branch of GetOperation panics before authentication runs, so an unauthenticated remote client can repeatedly send methods such as PROPFIND or lowercase get to abort connections and generate stack-trace log growth. The specific panic requires an exact static path; a concrete path matched only by a templated route does not reach the same sink. This issue is fixed in version 0.145.0.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/getkin/kin-openapi/commit/f1a5b523b82868d2d9be2e116b4e942892be72c3 security-advisories@github.com
- https://github.com/getkin/kin-openapi/releases/tag/v0.145.0 security-advisories@github.com
- https://github.com/getkin/kin-openapi/security/advisories/GHSA-fh4f-47mf-f2gj security-advisories@github.com
- https://github.com/getkin/kin-openapi/security/advisories/GHSA-fh4f-47mf-f2gj 134c704f-9b21-4f2e-91b3-4a467353bcc0