CVE-2026-42502

MEDIUM 6.1

Invoking incorrect handling of HTML elements in foreign content in golang.org/x/net/html

CVSS Score

6.1

EPSS Score

0.0%

EPSS Percentile

0th

Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.

Vendor	golang.org/x/net
Product	golang.org/x/net/html
Published	May 22, 2026
Last Updated	May 22, 2026

Stay Ahead of the Next One

Get instant alerts for golang.org/x/net golang.org/x/net/html

Be the first to know when new medium vulnerabilities affecting golang.org/x/net golang.org/x/net/html are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

Affected Versions

golang.org/x/net / golang.org/x/net/html

0 < 0.55.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

go.dev: https://go.dev/issue/79572 groups.google.com: https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8 go.dev: https://go.dev/cl/781701 pkg.go.dev: https://pkg.go.dev/vuln/GO-2026-5027

Credits

Tristan Madani