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CVE-2026-25681— Invoking incorrect handling of character references in DOCTYPE nodes in golang.org/x/net/html

Quick assessment

Affected
golang.org/x/net golang.org/x/net/html
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Google Go是美国谷歌（Google）公司的一种静态强类型、编译型、并发型，并具有垃圾回收功能的编程语言。 Google Go存在安全漏洞，该漏洞源于解析任意HTML并使用Render渲染可能导致意外的HTML树，可能被利用在尝试清理输入HTML的应用程序中执行XSS攻击。

AI Predicted 6.1 Difficulty: Easy EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript

Affected Version Matrix 1

VendorProduct Version RangeStatus
golang.org/x/net golang.org/x/net/html < 0.55.0 affected
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I. Basic Information for CVE-2026-25681

Vulnerability Information
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Vulnerability Title
Invoking incorrect handling of character references in DOCTYPE nodes in golang.org/x/net/html
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Google Go 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Google Go是美国谷歌（Google）公司的一种静态强类型、编译型、并发型，并具有垃圾回收功能的编程语言。 Google Go存在安全漏洞，该漏洞源于解析任意HTML并使用Render渲染可能导致意外的HTML树，可能被利用在尝试清理输入HTML的应用程序中执行XSS攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
golang.org/x/net golang.org/x/net/html 0 ~ 0.55.0 -

II. Public POCs for CVE-2026-25681

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III. Intelligence Information for CVE-2026-25681

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Patches & Fixes for CVE-2026-25681 (1)

Vendor Advisories for CVE-2026-25681 (1)

News Coverage for CVE-2026-25681 (1)

Other References for CVE-2026-25681 (1)

Same Patch Batch · golang.org/x/net · 2026-05-22 · 5 CVEs total

CVE-2026-25680 Invoking denial of service when parsing arbitrary HTML in golang.org/x/net/html
CVE-2026-42502 Invoking incorrect handling of HTML elements in foreign content in golang.org/x/net/html
CVE-2026-42506 Invoking incorrect handling of namespaced elements in foreign content in golang.org/x/net
CVE-2026-27136 Invoking duplicate attributes can cause XSS in golang.org/x/net/html

IV. Related Vulnerabilities

Same product: golang.org/x/net/html
Same vendor: golang.org/x/net

V. Comments for CVE-2026-25681

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