Description
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.
Published: 2026-05-07
Score: 6.1 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
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Remediation

No vendor fix or workaround currently provided.

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Tracking

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History

Wed, 13 May 2026 17:00:00 +0000

Type Values Removed Values Added
First Time appeared Golang
Golang go
CPEs cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*
Vendors & Products Golang
Golang go

Fri, 08 May 2026 22:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-79

Fri, 08 May 2026 20:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-79

Fri, 08 May 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 07 May 2026 23:15:00 +0000

Type Values Removed Values Added
First Time appeared Go Standard Library
Go Standard Library html/template
Vendors & Products Go Standard Library
Go Standard Library html/template

Thu, 07 May 2026 21:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-79

Thu, 07 May 2026 20:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Bypass of meta content URL escaping causes XSS in html/template
References

Subscriptions

Go Standard Library Html/template
Golang Go
cve-icon MITRE

Status: PUBLISHED

Assigner: Go

Published:

Updated: 2026-05-08T14:05:55.152Z

Reserved: 2026-04-07T18:13:03.527Z

Link: CVE-2026-39823

cve-icon Vulnrichment

Updated: 2026-05-08T14:05:50.846Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-07T20:16:43.290

Modified: 2026-05-13T16:58:45.697

Link: CVE-2026-39823

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-08T22:30:18Z

Weaknesses