CVE-2026-42506— Invoking incorrect handling of namespaced elements in foreign content in golang.org/x/net/html
Possible ATT&CK Techniques 1AI
T1059 · Command and Scripting InterpreterAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| golang.org/x/net | golang.org/x/net/html | < 0.55.0 | affected |
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I. Basic Information for CVE-2026-42506
Vulnerability Information
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Vulnerability Title
Invoking incorrect handling of namespaced elements in foreign content 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后使用Render渲染可能导致意外的HTML树，可能被利用执行跨站脚本攻击。
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-2026-42506
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
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Patches & Fixes for CVE-2026-42506 (2)
Vendor Advisories for CVE-2026-42506 (2)
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-2026-25681 | Invoking incorrect handling of character references in DOCTYPE nodes in golang.org/x/net/ | |
| CVE-2026-42502 | Invoking incorrect handling of HTML elements in foreign content in golang.org/x/net/html | |
| 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
- CVE-2026-25681
Invoking incorrect handling of character references in DOCT - CVE-2026-42502
Invoking incorrect handling of HTML elements in foreign con - CVE-2026-27136
Invoking duplicate attributes can cause XSS in golang.org/x - CVE-2026-25680
Invoking denial of service when parsing arbitrary HTML in go - CVE-2025-58190
Infinite parsing loop in golang.org/x/net
Same vendor: golang.org/x/net
- CVE-2026-25680
Invoking denial of service when parsing arbitrary HTML in go - CVE-2026-25681
Invoking incorrect handling of character references in DOCT - CVE-2026-42502
Invoking incorrect handling of HTML elements in foreign con - CVE-2026-27136
Invoking duplicate attributes can cause XSS in golang.org/x - CVE-2026-33814
Infinite loop in HTTP/2 transport when given bad SETTINGS_MA
V. Comments for CVE-2026-42506
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