{"id":"DEBIAN-CVE-2026-114437","details":"In the Golang Chi web framework, the ClientIPFromXFF middleware skips any X-Forwarded-For entry in a configured trusted CIDR but never verifies that the direct TCP peer in http.Request.RemoteAddr belongs to that CIDR. A client that can reach the Go server directly can therefore append a trusted-looking proxy address and choose the client IP returned by middleware.GetClientIP.  This issue affects chi before 5.4.0.","modified":"2026-10-22T23:00:08.082618237Z","published":"2026-10-22T22:47:38.085661219Z","upstream":["CVE-2026-114437"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-114437"}],"affected":[{"package":{"name":"golang-github-go-chi-chi","ecosystem":"Debian:12","purl":"pkg:deb/debian/golang-github-go-chi-chi?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.0.7-1","5.1.0-1","5.2.0-1","5.2.3-1","5.2.5-1","5.3.0-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-114437.json"}},{"package":{"name":"golang-github-go-chi-chi","ecosystem":"Debian:13","purl":"pkg:deb/debian/golang-github-go-chi-chi?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2.0-1","5.2.3-1","5.2.5-1","5.3.0-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-114437.json"}},{"package":{"name":"golang-github-go-chi-chi","ecosystem":"Debian:14","purl":"pkg:deb/debian/golang-github-go-chi-chi?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2.0-1","5.2.3-1","5.2.5-1","5.3.0-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-114437.json"}}],"schema_version":"1.9.0"}