Bug 2445351 (CVE-2026-27142) - CVE-2026-27142 html/template: URLs in meta content attribute actions are not escaped in html/template
Summary: CVE-2026-27142 html/template: URLs in meta content attribute actions are not ...
Keywords:
Status: NEW
Alias: CVE-2026-27142
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2446060
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-06 22:02 UTC by OSIDB Bzimport
Modified: 2026-07-02 16:50 UTC (History)
10 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-03-06 22:02:19 UTC 
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.
Note You need to log in before you can comment on or make changes to this bug.