CVE-2026-27142

Name: CVE-2026-27142
Creator: NVD / NIST
Published: 2026-03-06T22:16:01.177+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.33%

Last modified Jun 17, 2026

CVE-2026-27142 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Actions which insert URLs into the content attribute of HTML meta tags are not escaped. This can allow XSS if the meta tag also has an http-equiv attribute with the value "refresh". EPSS estimates a 0.33% chance of exploitation in the next 30 days.

Description

Actions which insert URLs into the content attribute of HTML meta tags are not escaped. This can allow XSS if the meta tag also has an http-equiv attribute with the value "refresh". A new GODEBUG setting has been added, htmlmetacontenturlescape, which can be used to disable escaping URLs in actions in the meta content attribute which follow "url=" by setting htmlmetacontenturlescape=0.

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

0.33%

24.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Golang	Go	< 1.25.8
Golang	Go	1.26.0

References

https://go.dev/cl/752081Mailing List
https://go.dev/issue/77954Issue Tracking
https://groups.google.com/g/golang-announce/c/EdhZqrQ98hkRelease Notes
https://pkg.go.dev/vuln/GO-2026-4603Vendor Advisory

Timeline

Published: Mar 6, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-27142?

How severe is CVE-2026-27142?

CVE-2026-27142 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.33% probability of exploitation in the next 30 days.

How do I fix CVE-2026-27142?

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-2026-27142?

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

Scan your code now

Source: NVD / NIST