CVE-2026-42506

Name: CVE-2026-42506
Creator: NVD / NIST
Published: 2026-05-22T16:16:20.803+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.19%

Last modified Jun 17, 2026

CVE-2026-42506 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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.. EPSS estimates a 0.19% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.19%

8.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Golang	Net	< 0.55.0

References

https://go.dev/cl/781700Issue Tracking
https://go.dev/issue/79571Issue Tracking
https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8Mailing List
https://pkg.go.dev/vuln/GO-2026-5025Vendor Advisory

Timeline

Published: May 22, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-42506?

How severe is CVE-2026-42506?

CVE-2026-42506 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.19% probability of exploitation in the next 30 days.

How do I fix CVE-2026-42506?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-42506?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST