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...

CVE-2026-39821

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...

CVE-2026-39821

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...

CVE-2026-39821 Invoking failure to reject ASCII-only Punycode-encoded labels in golang.org/x/net/idna

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...

CVE-2026-39821

CVE-2026-39821 affects golang.org/x/net/idna; ToASCII/ToUnicode incorrectly accept Punycode-encoded labels that decode to ASCII-only labels (e.g., xn--example-.com). The issue can enable privilege escalation in programs that validate ASCII hostnames but later convert to Unicode, potentially grant...

CVE-2026-39821

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...

GO-2026-5026 Invoking failure to reject ASCII-only Punycode-encoded labels in golang.org/x/net/idna

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...

Critical Photon OS Security Update - PHSA-2026-5.0-90-0855

Updates of 'rubygem-addressable', 'libvirt', 'libxml2', 'containerd', 'glib', 'glibc', 'docker', 'go', 'python3-idna', 'gtk3' packages of Photon OS have been released...

Astra Linux – Vulnerability in libuv1

Node.js versions prior to 16.4.1, 14.17.2, and 12.22.2 are vulnerable to an out-of-bounds read when the uvidnatoascii function is used to convert strings to ASCII. The pointer p is read and incremented without checking whether it lies beyond pe, where pe holds a pointer to the end of the buffer...

Astra Linux – Vulnerability in Python 3.7, Python 2.7

A issue was discovered in Python before version 3.11.1. An unnecessary quadratic algorithm exists in one path when processing certain inputs to the IDNA RFC 3490 decoder. This could lead to a CPU denial of service if a maliciously crafted, unreasonably long hostname was provided to the decoder...

OPENSUSE-SU-2026:10829-1 python311-idna-3.15-1.1 on GA media

These are all security issues fixed in the python311-idna-3.15-1.1 package on the GA media of openSUSE Tumbleweed...

GHSA-65PC-FJ4G-8RJX Internationalized Domain Names in Applications (IDNA): Specially crafted inputs to idna.encode() can bypass CVE-2024-3651 fix

This is the same issue as CVE-2024-3651, however the original remediation in 2024 was not a complete fix. Payloads such as "\u0660" N or "\u30fb" N + "\u6f22" utilize the validcontexto function prior to length rejection, and for high values of N will take a long time to process. Impact A speciall...