NULL Pointer Dereference Affecting github.com/getkin/kin-openapi/openapi3filter package, versions <0.146.0
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
- disclosed16 Oct 2026
- creditUnknown
Introduced: 16 Oct 2026
NewCVE-2026-100349 (opens in a new tab)How to fix?
Upgrade github.com/getkin/kin-openapi/openapi3filter to version 0.146.0 or higher.
Overview
Affected versions of this package are vulnerable to NULL Pointer Dereference through the ValidateResponse process when a response header is declared with content instead of schema. An attacker can cause a process crash by sending a request to an affected endpoint, resulting in a nil pointer dereference during header validation. This is only exploitable if the OpenAPI specification includes a response header with content but omits the schema field.
Workaround
This vulnerability can be mitigated by using schema on the response header or skipping ValidateResponse for those operations.