{"id":"DEBIAN-CVE-2026-37236","details":"grpc-gateway v2.28.0 is vulnerable to Incorrect Access Control. The application processes the X-HTTP-Method-Override header in ServeMux.ServeHTTP without restricting allowed methods. When a POST request with Content-Type application/x-www-form-urlencoded includes this header, the request method is rewritten to an arbitrary attacker-supplied value before routing. This allows bypassing method-based access controls enforced by upstream proxies or WAFs.","modified":"2026-09-09T08:47:25.993342337Z","published":"2026-08-28T16:17:46.157Z","upstream":["CVE-2026-37236"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-37236"}],"affected":[{"package":{"name":"golang-github-grpc-ecosystem-grpc-gateway","ecosystem":"Debian:12","purl":"pkg:deb/debian/golang-github-grpc-ecosystem-grpc-gateway?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.16.0-1","1.16.0-2","1.16.0-3","1.16.0-4","1.6.4-2","2.20.0-1","2.20.0-2","2.27.2-1","2.27.2-2","2.27.2-3","2.30.0-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-37236.json"}},{"package":{"name":"golang-github-grpc-ecosystem-grpc-gateway","ecosystem":"Debian:13","purl":"pkg:deb/debian/golang-github-grpc-ecosystem-grpc-gateway?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.20.0-2","2.27.2-1","2.27.2-2","2.27.2-3","2.30.0-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-37236.json"}},{"package":{"name":"golang-github-grpc-ecosystem-grpc-gateway","ecosystem":"Debian:14","purl":"pkg:deb/debian/golang-github-grpc-ecosystem-grpc-gateway?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.30.0-1"}]}],"versions":["2.20.0-2","2.27.2-1","2.27.2-2","2.27.2-3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-37236.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:H/I:H/A:H"}]}