Interpretation Conflict Affecting github.com/getkin/kin-openapi/openapi3filter package, versions >=0.144.0 <0.147.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published18 Oct 2026
- disclosed15 Oct 2026
- creditUnknown
Introduced: 15 Oct 2026
NewCVE-2026-100351 (opens in a new tab)How to fix?
Upgrade github.com/getkin/kin-openapi/openapi3filter to version 0.147.0 or higher.
Overview
Affected versions of this package are vulnerable to Interpretation Conflict through the ValidationHandler.Middleware process when used with a downstream router that interprets encoded paths, such as gorilla/mux with UseEncodedPath(). An attacker can access protected operations without authentication by sending specially crafted requests with encoded path segments that bypass security checks. This is only exploitable if the application uses ValidationHandler.Middleware as the security gate, the downstream router preserves and interprets encoded paths, a public exact route and a protected parameterized route overlap after decoding, both routes expose the same HTTP method, and the protected handler relies on the validation layer's security decision.