CVE-2026-27142
URLs in meta content attribute actions are not escaped in html/template
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
Exploitability
AV:NAttack VectorNetwork
AC:LAttack ComplexityLow
PR:NPrivileges RequiredNone
UI:RUser InteractionRequired
Scope
S:CScopeChanged
Impact
C:LConfidentialityLow
I:LIntegrityLow
A:NAvailabilityNone
Weaknesses
Affected Products
Red Hat Inc.
commercial·USaka red hat
Go standard library
oss-project·USaka crypto/x509, golang standard library, net/http, html/template
ООО «Ред Софт»
commercial·RUaka red soft
The Go Project
oss-projectaka go, golang-google-protobuf, crypto
Grafana Labs
commercial·US
golang
oss-project·US
Exploitability
Official Patch Available
Attack Graph
Products CVE Techniques Tactics
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MITRE ATT&CK
2 techniques Execution
Initial Access
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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