{"id":"UBUNTU-CVE-2026-73502","details":"kin-openapi is a Go project for handling OpenAPI files. From 0.2.0 until 0.144.0, openapi3filter.ValidateRequest can encounter a NULL-pointer-dereference denial of service when an operation declares a content parameter whose application/json media type has no schema. In openapi3filter/req_resp_decoder.go, the default defaultContentParameterDecoder dereferences mt.Schema.Value without checking whether mt.Schema is nil, even though doc.Validate() accepts the document under OpenAPI 3.0.x and 3.1.x. A single unauthenticated request supplying the parameter value can panic request validation, causing an aborted request with log growth in the common synchronous net/http path or a full process crash in integrations without recovery. This issue is fixed in version 0.144.0.","modified":"2026-09-02T19:42:04.731823085Z","published":"2026-08-18T18:19:00Z","upstream":["CVE-2026-73502"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-73502"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-73502"}],"affected":[{"package":{"name":"golang-github-getkin-kin-openapi","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/golang-github-getkin-kin-openapi?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.32.0-2","0.80.0-1","0.85.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.85.0-1","binary_name":"golang-github-getkin-kin-openapi-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73502.json"}},{"package":{"name":"golang-github-getkin-kin-openapi","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/golang-github-getkin-kin-openapi?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.117.0-1","0.120.0-1","0.122.0-3","0.123.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-getkin-kin-openapi-dev","binary_version":"0.123.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73502.json"}},{"package":{"name":"golang-github-getkin-kin-openapi","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/golang-github-getkin-kin-openapi?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.124.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-getkin-kin-openapi-dev","binary_version":"0.124.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73502.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]}