{"action":"No fix published. Pin and monitor.","affected":[{"introduced":"0"}],"component":"undertow","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":[],"id":"tcs_01M5NQY0TP2NV2CEMBGX2ZWSVG","modified_at":"2026-10-01T03:02:30.146378542Z","published_at":"2026-08-14T15:17:09.310Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-19879","https://security-tracker.debian.org/tracker/CVE-2026-19879"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-19879","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-19879"}],"summary":"A flaw was found in Undertow, an HTTP server, within its HTTP response header writing path. The `writeString()` method performs a silent narrowing cast from 16-bit Unicode characters to 8-bit bytes wh"}