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CVE-2026-12957— Arbitrary Code Execution in Language Servers for AWS

Quick assessment

Affected
Amazon Web Services Language Servers for AWS
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Amazon Web Services Language Servers for AWS是美国Amazon Web Services公司的一款面向云环境的语言服务器。 Amazon Web Services Language Servers for AWS 1.65.0之前版本存在权限许可和访问控制问题漏洞，该漏洞源于信任边界执行不当，可能导致本地用户打开特制工作空间时自动执行项目配置文件中的任意命令，导致任意代码执行。

CVSS 7.8 · High EPSS 0.23% · P13

Affected Version Matrix 1

VendorProduct Version RangeStatus
Amazon Web Services Language Servers for AWS < 1.65.0 affected
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I. Basic Information for CVE-2026-12957

Vulnerability Information
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Vulnerability Title
Arbitrary Code Execution in Language Servers for AWS
Source: CVE Program / CVE List V5
Vulnerability Description
Improper trust boundary enforcement in Language Servers for AWS before version 1.65.0 on all supported platforms may allow a for arbitrary code execution. If a local user opens a maliciously crafted workspace, any commands within the project configuration files may be automatically executed. This issue requires the user to trust the workspace when prompted. To remediate this issue, users should upgrade to Language Servers for AWS version 1.65.0 or higher.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键资源的不正确权限授予
Source: CVE Program / CVE List V5
Vulnerability Title
Amazon Web Services Language Servers for AWS 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Amazon Web Services Language Servers for AWS是美国Amazon Web Services公司的一款面向云环境的语言服务器。 Amazon Web Services Language Servers for AWS 1.65.0之前版本存在权限许可和访问控制问题漏洞，该漏洞源于信任边界执行不当，可能导致本地用户打开特制工作空间时自动执行项目配置文件中的任意命令，导致任意代码执行。
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
Amazon Web Services Language Servers for AWS 0 ~ 1.65.0 -

II. Public POCs for CVE-2026-12957

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8904 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-12957

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Vendor Advisories for CVE-2026-12957 (2)

IV. Related Vulnerabilities

Same product: Language Servers for AWS
Same vendor: Amazon Web Services
Same weakness: CWE-732

V. Comments for CVE-2026-12957

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