CVE-2026-45409

Internationalized Domain Names in Applications IDNA for Python provides support for Internationalized Domain Names in Applications IDNA and Unicode IDNA Compatibility Processing. In versions prior to 3.15, payloads such as "\u0660" N or "\u30fb" N + "\u6f22" utilize the validcontexto function pri...

CVE-2026-45409

CVE-2026-45409 affects Python’s IDNA handling (idna.encode) in Python-idna. A specially crafted input could cause heavy resource consumption and potential DoS. The issue mirrors CVE-2024-3651; fixes were extended in 3.14–3.15 to reject long inputs earlier and more broadly (per-label conversions a...

CVE-2026-39821

A flaw was found in golang.org/x/net/idna. ToASCII and ToUnicode incorrectly accept Punycode-encoded labels that decode to an ASCII-only hostname for example, xn--example-.com returns example.com instead of an error. Applications that validate the ASCII form then convert to Unicode may grant acce...

SUSE-SU-2026:2285-1 Security update for yq

This update for yq fixes the following issues: - CVE-2026-25680,CVE-2026-25681,CVE-2026-27136,CVE-2026-42502,CVE-2026-42506: golang.org/x/net/html: multiple issues when parsing HTML files bsc1267053. - CVE-2026-39821: golang.org/x/net/idna: failure to reject ASCII-only Punycode-encoded labels...

golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing

A flaw was found in golang.org/x/net/idna. ToASCII and ToUnicode incorrectly accept Punycode-encoded labels that decode to an ASCII-only hostname for example, xn--example-.com returns example.com instead of an error. Applications that validate the ASCII form then convert to Unicode may grant acce...

golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing

A flaw was found in golang.org/x/net/idna. ToASCII and ToUnicode incorrectly accept Punycode-encoded labels that decode to an ASCII-only hostname for example, xn--example-.com returns example.com instead of an error. Applications that validate the ASCII form then convert to Unicode may grant acce...

SUSE-SU-2026:21914-1 Security update for python-idna

This update for python-idna fixes the following issue - CVE-2026-45409: specially crafted inputs to idna.encode can bypass earlier security fix bsc1265413...

SUSE-SU-2026:21873-1 Security update for python-idna

This update for python-idna fixes the following issue - CVE-2026-45409: specially crafted inputs to idna.encode can bypass earlier security fix bsc1265413...

Invoking failure to reject ASCII-only Punycode-encoded labels in golang.org/x/net/idna

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Linux Distros Unpatched Vulnerability : CVE-2026-39821

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII- only label. For example, ToUnicodexn--example-.com...

Improper Authentication

Overview Affected versions of this package are vulnerable to Improper Authentication via the ToASCII and ToUnicode functions. An attacker can bypass hostname validation by submitting Punycode-encoded labels that decode to ASCII-only labels, potentially leading to privilege escalation in...

AZL-87663 CVE-2026-39821 affecting package docker-cli for versions less than 25.0.7-3

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-87792 CVE-2026-39821 affecting package golang for versions less than 1.25.11-3

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-87573 CVE-2026-39821 affecting package cri-tools for versions less than 1.32.0-6

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-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-87984 CVE-2026-39821 affecting package kured for versions less than 1.15.0-5

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-87360 CVE-2026-39821 affecting package application-gateway-kubernetes-ingress for versions less than 1.7.7-5

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-88068 CVE-2026-39821 affecting package moby-engine for versions less than 25.0.3-18

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-87834 CVE-2026-39821 affecting package jx for versions less than 3.10.182-4

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-87804 CVE-2026-39821 affecting package ignition-flatcar for versions less than 2.22.0-5

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...