CVE-2026-25679— Incorrect parsing of IPv6 host literals in net/url
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I. Basic Information for CVE-2026-25679
Vulnerability Information
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Vulnerability Title
Incorrect parsing of IPv6 host literals in net/url
Source: NVD (National Vulnerability Database)
Vulnerability Description
url.Parse insufficiently validated the host/authority component and accepted some invalid URLs.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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url.Parse对主机/授权组件验证不足并接受某些无效URL，导致在net/url中解析IPv6主机字面值错误。
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 |
|---|---|---|---|---|
| Go standard library | net/url | 0 ~ 1.25.8 | - |
II. Public POCs for CVE-2026-25679
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Go standard library · 2026-03-06 · 5 CVEs total
| CVE-2026-27138 | Panic in name constraint checking for malformed certificates in crypto/x509 | |
| CVE-2026-27137 | Incorrect enforcement of email constraints in crypto/x509 | |
| CVE-2026-27142 | URLs in meta content attribute actions are not escaped in html/template | |
| CVE-2026-27139 | FileInfo can escape from a Root in os |
IV. Related Vulnerabilities
Same vendor: Go standard library
- CVE-2026-39823
Bypass of meta content URL escaping causes XSS in html/templ - CVE-2026-39820
Quadratic string concatentation in consumeComment in net/mai - CVE-2026-33811
Crash when handling long CNAME response in net - CVE-2026-42499
Quadratic string concatenation in consumePhrase in net/mail - CVE-2026-39826
Escaper bypass leads to XSS in html/template
V. Comments for CVE-2026-25679
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