CVE-2026-42502

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-2026-5027

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

https://go.dev/issue/79572

https://go.dev/cl/781701

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-31448

Details

Source: Mitre, NVD

Published: 2026-05-22

Updated: 2026-07-23

Named Vulnerability: GO-2026-5027Named Vulnerability: GHSA-wrh2-89vg-4j9g

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