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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
golang.org/x/net golang.org/x/net/html unaffected
Version Status Constraints
0 affected < 0.55.0

No data.

No data.

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Project Subscriptions

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://go.dev/cl/781685 cve-icon
https://go.dev/issue/79575 cve-icon
https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8 cve-icon
https://pkg.go.dev/vuln/GO-2026-5030 cve-icon
History

Fri, 22 May 2026 17:30:00 +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'}

Fri, 22 May 2026 17:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-79

Fri, 22 May 2026 15:45:00 +0000

Type Values Removed Values Added
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.
Title Invoking duplicate attributes can cause XSS in golang.org/x/net/html
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Go

Published:

Updated: 2026-05-22T16:59:52.807Z

Reserved: 2026-02-17T19:57:28.434Z

Link: CVE-2026-27136

cve-icon Vulnrichment

Updated: 2026-05-22T16:59:49.166Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-22T17:00:15Z

Weaknesses