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CVE-2026-25681

Invoking incorrect handling of character references in DOCTYPE nodes in golang.org/x/net/html

Published: May 22, 2026Updated: May 29, 2026 Sources: CVE List NVDCWE-1021
NVD MITRE
6.1CVSSMEDIUM
EPSS Score
0.2%
Top 85.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.

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-1021

Affected Products

netgolangOSS Libraries
golang.org/x/net/htmlgolang.org/x/net
Library
OSS Libraries / go
golangoss-projectUSOSS Libraries
golang.org/x/netoss-projectOSS Librariesaka golang.org/x/net

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Initial Access
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References

https://go.dev/cl/781703
go.dev
https://go.dev/issue/79574
go.dev
https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8
groups.google.com
and 1 more references View all →

Timeline

Published
May 22, 2026
Last Updated
May 29, 2026

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