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CVE-2026-27142

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

Published: Mar 6, 2026Updated: Apr 21, 2026 Sources: CVE List NVD BDUCWE-79
6.1MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 74.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:CC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-79

Affected Products

Red Hat Inc.
commercial·USaka red hat
Red Hat Enterprise LinuxOn-premOS
Operating Systems / linux-distro
Openshift Service MeshOn-prem
Operating Systems / linux-distro
Red Hat OpenShift Container PlatformOn-prem
Operating Systems / linux-distro
Red Hat OpenShift VirtualizationOn-prem
Operating Systems / linux-distro
Red Hat Enterprise Linux AIOn-prem
Operating Systems / linux-distro
Go standard library
oss-project·USaka net/http, html/template, golang standard library, crypto/x509
html/templateLibraryLibrary
OSS Libraries / go
ООО «Ред Софт»
commercial·RUaka red soft
РЕД ОСOn-premOS
Operating Systems / linux-distro
The Go Project
oss-projectaka go, golang-google-protobuf, crypto
Go
OSS Libraries
Grafana Labs
commercial·US
Grafana AlloyOn-prem
Enterprise Software / itsm-monitoring
golang
oss-project·US
go
OSS Libraries

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Execution
Initial Access
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References

https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk
groups.google.com
https://go.dev/issue/77954
go.dev
https://go.dev/cl/752081
go.dev
and 5 more references View all →

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