{"id":"CLEANSTART-2026-EA29752","summary":"ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label","details":"CVE-2026-39821 affects multiple packages. The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. See references for individual vulnerability details.","modified":"2026-10-23T00:45:04.964232575Z","published":"2026-10-23T00:37:41.571577Z","upstream":["CVE-2026-39821"],"database_specific":{},"references":[{"type":"ADVISORY","url":"https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-EA29752.json"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-39821"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39821"}],"affected":[{"package":{"name":"kyverno","ecosystem":"CleanStart","purl":"pkg:apk/cleanstart/kyverno"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.1-r5"}]}],"database_specific":{"source":"https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-EA29752.json"}},{"package":{"name":"argo-cd","ecosystem":"CleanStart","purl":"pkg:apk/cleanstart/argo-cd"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.3-r0"}]}],"database_specific":{"source":"https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-EA29752.json"}},{"package":{"name":"rundeck","ecosystem":"CleanStart","purl":"pkg:apk/cleanstart/rundeck"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.1-r4"}]}],"database_specific":{"source":"https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-EA29752.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N"}]}