CVE-2026-42503— Accidental binding to INADDR_ANY might lead to RCE in golang.org/x/tools/gopls
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I. Basic Information for CVE-2026-42503
Vulnerability Information
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Vulnerability Title
Accidental binding to INADDR_ANY might lead to RCE in golang.org/x/tools/gopls
Source: NVD (National Vulnerability Database)
Vulnerability Description
gopls by default communicates via pipe. However, -port and -listen flags are supported as means of debugging. If -listen is given a value without an explicit host (e.g. :8080), or -port is used, gopls will listen on 0.0.0.0. As a result, users might inadvertently cause gopls to bind 0.0.0.0. This can allow a malicious party on the same network to execute code arbitrarily via gopls.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1327
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，该漏洞源于监听地址绑定到0.0.0.0，可能导致同一网络上的恶意方通过gopls执行任意代码。
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/tools | golang.org/x/tools/gopls | 0.0.0 ~ 0.22.0 | - |
II. Public POCs for CVE-2026-42503
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|---|
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IV. Related Vulnerabilities
Same weakness: CWE-1327
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Azure IoT Explorer Information Disclosure Vulnerability - CVE-2025-11538
Keycloak-server: debug default bind address - CVE-2025-61934
AutomationDirect Productivity Suite Binding to an Unrestrict
V. Comments for CVE-2026-42503
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