CLEANSTART-2026-HR50080 ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label

Multiple security vulnerabilities affect the cert-manager package. The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. See references for individual vulnerability details...

CLEANSTART-2026-GK68352 ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label

Multiple security vulnerabilities affect the kubernetes-dns-node-cache package. The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. See references for individual vulnerability details...

CLEANSTART-2026-SS34822 ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label

Multiple security vulnerabilities affect the metallb package. The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. See references for individual vulnerability details...

AZL-87873 CVE-2026-39821 affecting package kube-vip-cloud-provider for versions less than 0.0.10-6

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" rather than an error. This behavior can lead to privilege escalation in programs using the idna...

AZL-87606 CVE-2026-39821 affecting package docker-buildx for versions less than 0.14.0-13

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" rather than an error. This behavior can lead to privilege escalation in programs using the idna...