CVE-2026-62847— Metalama 世界可写目录 DLL 种植本地代码执行漏洞
一分钟漏洞结论
影响对象
metalama Metalama
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Metalama 是一个基于 Roslyn 的 C开源模式与架构工具包。在 2025.1.18、2026.0.25 和 2026.1.19 版本之前，Metalama.Framework 和 Metalama.Tool 会从可预测的临时目录中加载并执行编译时程序集、辅助可执行工具以及嵌入的辅助程序集。在 Linux 和 macOS 系统上，默认的 路径对全局用户可写，且现有工件仅依据哨兵文件（sentinel）或 标记文件进行信任，而未经过完整性验证。 在共享机器或 CI/构建代理上，本地非特权用户可以预先创建确定
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一、 漏洞 CVE-2026-62847 基础信息
漏洞信息
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Vulnerability Title
Metalama: Local code execution via DLL planting in world-writable temporary directories (Linux/macOS)
来源: CVE Program / CVE List V5
Vulnerability Description
Metalama is a Roslyn-based open-source patterns and architecture toolkit for C#. Prior to 2025.1.18, 2026.0.25 and 2026.1.19, Metalama.Framework and Metalama.Tool load and execute compile-time assemblies, auxiliary executable tools and embedded helper assemblies from predictable temporary directories. On `Linux` and `macOS`, the default `Path.GetTempPath()` location is world-writable, and existing artifacts are trusted based on sentinel or `.completed` marker files rather than integrity verification. A local unprivileged user on a shared machine or CI/build agent can pre-create the deterministic directory structure and plant a malicious DLL with the matching sentinel. When a higher-privileged developer or build account subsequently builds, Metalama skips regeneration and executes the planted artifact in the compiler, IDE or MSBuild process as the building user. This permits cross-user privilege escalation, reading source and secrets, supply-chain tampering with build output, or disrupting builds. Default Windows per-user temporary directories are protected by ACLs and are not affected. Deployer-selected insecure cache locations are outside the vulnerability's scope. This issue is fixed in versions 2025.1.18, 2026.0.25 and 2026.1.19.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
不安全的临时文件
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-62847 的公开POC
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CVE-2026-62847 其他参考 (7)
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https://github.com/metalama/Metalama/pull/1650 x_refsource_MISC
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https://github.com/metalama/Metalama/releases/tag/release/2026.1.19 x_refsource_MISC
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https://github.com/metalama/Metalama/releases/tag/release/2026.0.25 x_refsource_MISC
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https://github.com/metalama/Metalama/releases/tag/release/2025.1.18 x_refsource_MISC
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https://github.com/metalama/Metalama/security/advisories/GHSA-m6wq-39m7-9xpp x_refsource_CONFIRM