Bug 2467811 (CVE-2026-39823) - CVE-2026-39823 html/template: golang: Go html/template: Cross-Site Scripting via improper URL escaping in meta tag content
Summary: CVE-2026-39823 html/template: golang: Go html/template: Cross-Site Scripting ...
Keywords:
Status: NEW
Alias: CVE-2026-39823
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-07 20:01 UTC by OSIDB Bzimport
Modified: 2026-06-25 14:42 UTC (History)
140 users (show)

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

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:22112 0 None None None 2026-06-01 01:04:48 UTC
Red Hat Product Errata RHSA-2026:22120 0 None None None 2026-06-01 00:43:32 UTC
Red Hat Product Errata RHSA-2026:22121 0 None None None 2026-06-01 01:00:36 UTC

Description OSIDB Bzimport 2026-05-07 20:01:21 UTC 
CVE-2026-27142 fixed a vulnerability in which URLs were not correctly escaped inside of a <meta> tag's <content> attribute. If the URL content were to insert ASCII whitespaces around the '=' rune inside of the <content> attribute, the escaper would fail to similarly escape it, leading to XSS.
Comment 2 errata-xmlrpc 2026-06-01 00:43:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:22120 https://access.redhat.com/errata/RHSA-2026:22120
Comment 3 errata-xmlrpc 2026-06-01 01:00:30 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:22121 https://access.redhat.com/errata/RHSA-2026:22121
Comment 4 errata-xmlrpc 2026-06-01 01:04:41 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:22112 https://access.redhat.com/errata/RHSA-2026:22112
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