CVE-2026-42506

medium

Description

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.

References

https://pkg.go.dev/vuln/GO-2026-5025

https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8

https://go.dev/issue/79571

https://go.dev/cl/781700

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-31446

Details

Source: Mitre, NVD

Published: 2026-05-22

Updated: 2026-07-23

Named Vulnerability: GO-2026-5025Named Vulnerability: GHSA-cg87-vwwh-xvgj

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.1

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