Golang 1.25.x < 1.25.13 / 1.26.x < 1.26.6 Multiple Vulnerabilities

The version of Golang running on the remote host is 1.25.x prior to 1.25.13, or 1.26.x prior to 1.26.6. It is, therefore, affected by multiple vulnerabilities in the standard library and the toolchain, as referenced in the golang-announce advisory. - The ToASCII and ToUnicode functions incorrectl...

openSUSE 16 Security Update : gh (openSUSE-SU-2026:21432-1)

The remote openSUSE 16 host has packages installed that are affected by a vulnerability as referenced in the openSUSE- SU-2026:21432-1 advisory. Changes in gh: - CVE-2026-39821: reject all-ASCII xn-- Punycode labels in the vendored golang.org/x/net/idna package regardless of Go's unicode.Version...

OPENSUSE-SU-2026:21432-1 Security update for gh

This update for gh fixes the following issues: Changes in gh: - CVE-2026-39821: reject all-ASCII xn-- Punycode labels in the vendored golang.org/x/net/idna package regardless of Go's unicode.Version boo1266618...

Oracle Linux 10 : git-lfs (ELSA-2026-30855)

The remote Oracle Linux 10 host has a package installed that is affected by a vulnerability as referenced in the ELSA-2026-30855 advisory. - Fix CVE-2026-39821 in vendored golang.org/x/net idna package Tenable has extracted the preceding description block directly from the Oracle Linux security...

TencentOS Server 3: git-lfs (TSSA-2026:0637)

The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2026:0637 advisory. Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:...

TencentOS Server 3: grafana-pcp (TSSA-2026:0635)

The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2026:0635 advisory. Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:...

Alibaba Cloud Linux 3 : 0193: grafana-pcp (ALINUX3-SA-2026:0193)

The remote Alibaba Cloud Linux 3 host has a package installed that is affected by a vulnerability as referenced in the ALINUX3-SA-2026:0193 advisory. Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities: CVE-2026-39821: The ToASCII and ToUnicode functions...

Alibaba Cloud Linux 3 : 0190: git-lfs (ALINUX3-SA-2026:0190)

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by a vulnerability as referenced in the ALINUX3-SA-2026:0190 advisory. Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities: CVE-2026-39821: The ToASCII and ToUnicode functions...

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...

Important: git-lfs security update

Git Large File Storage LFS replaces large files such as audio samples, videos, datasets, and graphics with text pointers inside Git, while storing the file contents on a remote server. Security Fixes: golang.org/x/net/idna: golang: golang.org/x/net/idna: Privilege escalation via incorrect Punycod...

USN-8416-1 golang-golang-x-net-dev vulnerability

It was discovered that Go Networking incorrectly handled certain Punycode-encoded labels in the idna package. An attacker could possibly use this issue to bypass hostname-based access restrictions...

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...

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...

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-87675 CVE-2026-39821 affecting package docker-compose for versions less than 2.27.0-11

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-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-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-87266 CVE-2026-39821 affecting package kata-containers-preview 3.27.0~preview2-1

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...