GO-2026-5025

vendorUSosv

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

view advisory published 2026-05-22Licence: per source

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.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-42506US	—	0.24% (14th)	—	2026-05-22
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 sanit…

references

External citations — patches, advisories, analysis.

https://go.dev/cl/781700FIX
https://go.dev/issue/79571REPORT
https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8WEB

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