CVE-2026-27136: Invoking duplicate attributes can cause XSS in golang.org/x/net/html

Overview

Severity

Medium (CVSS 6.1)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploit Status

Not Exploited

Patch Tuesday

2026-May

Released

2026-05-27

EPSS Score

0.03% (percentile: 9.1%)

Affected Products (24)

Open Source Software

• azl3 application-gateway-kubernetes-ingress 1.7.7-3 on Azure Linux 3.0
• azl3 cert-manager 1.12.15-6 on Azure Linux 3.0
• azl3 cf-cli 8.7.11-5 on Azure Linux 3.0
• azl3 cloud-provider-kubevirt 0.5.1-3 on Azure Linux 3.0
• azl3 containerd2 2.1.6-2 on Azure Linux 3.0
• azl3 containerized-data-importer 1.62.0-3 on Azure Linux 3.0
• azl3 cri-tools 1.32.0-4 on Azure Linux 3.0
• azl3 docker-buildx 0.14.0-11 on Azure Linux 3.0
• azl3 docker-compose 2.27.0-9 on Azure Linux 3.0
• azl3 gh 2.62.0-15 on Azure Linux 3.0
• azl3 influxdb 2.7.5-15 on Azure Linux 3.0
• azl3 keda 2.14.1-11 on Azure Linux 3.0
• azl3 kube-vip-cloud-provider 0.0.10-5 on Azure Linux 3.0
• azl3 kubernetes 1.30.10-23 on Azure Linux 3.0
• azl3 kubevirt 1.7.1-2 on Azure Linux 3.0
• azl3 multus 4.0.2-7 on Azure Linux 3.0
• azl3 packer 1.9.5-13 on Azure Linux 3.0
• azl3 prometheus-adapter 0.12.0-5 on Azure Linux 3.0
• azl3 sriov-network-device-plugin 3.7.0-5 on Azure Linux 3.0
• azl3 telegraf 1.31.0-19 on Azure Linux 3.0

Other

• 21358-17084
• 21359-17084
• 20433-17084

Mariner

• azl3 libcontainers-common 20240213-3 on Azure Linux 3.0

Revision History

• 2026-05-27: Information published.