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CVE PROGRAM SOURCE RECORD6.1 Medium

CVE-2026-27142

URLs in meta content attribute actions are not escaped in html/template

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Status
Published
Published
Updated
Assigning organization
Go

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Go standard library html/template

Default version status: unaffected

  • 0 to < 1.25.8affected
  • 1.26.0-0 to < 1.26.1affected

References