CVE-2026-27142
Medium
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.
SeverityMedium
CVSS6.1
Exploit probability—
ProductGo
PublishedMar 6, 2026
First seenMar 6, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- golang go1.25.8 or later
- stdlib1.25.8, 1.26.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| golang go | v < 1.25.8, 1.26.0 | 1.25.8 |
| stdlibGo | v < 1.25.8, 1.26.0-0 ≤ v < 1.26.1 | 1.25.8, 1.26.1 |
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