{"action":"Upgrade tomcat9 to 9.0.70-2 or later.","affected":[{"fixed":"9.0.70-2","introduced":"0"}],"component":"tomcat9","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["9.0.70-2"],"id":"tcs_01M5NS0QPDDZESKCZ9YWPC97YE","modified_at":"2026-10-27T09:47:28.080835607Z","published_at":"2026-05-12T16:16:17.800Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-42498","https://security-tracker.debian.org/tracker/CVE-2026-42498"],"severity":{"label":"high","score":7.3},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-42498#Debian:13/tomcat9","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-42498"}],"summary":"Exposure of HTTP Authentication Header to unexpected hosts during WebSocket authentication vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0"}