{"action":"No fix published. Pin and monitor.","affected":[{"introduced":"0"}],"component":"golang-golang-x-net","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":[],"id":"tcs_01M5NRWK0EVB2PPZ41XEN929YA","modified_at":"2026-10-01T03:03:11.314741261Z","published_at":"2026-05-22T16:16:20.410Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-39821","https://security-tracker.debian.org/tracker/CVE-2026-39821"],"severity":{"label":"critical","score":9.6},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-39821#Debian:13/golang-golang-x-net","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-39821"}],"summary":"The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. For example, ToUnicode(\"xn--example-.com\") incorrectly returns the name \"example.com\""}