CVE-2026-62848— Metalama 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 的开源 C模式与架构工具包。在版本 2023.0.101-rc 至 2025.1.18、2026.0.25 和 2026.1.19 期间，其 Windows 版 Visual Studio 集成组件在反序列化本地命名管道消息时，未限制可实例化的 CLR 类型。该管道连接了 （Visual Studio 主进程）、进程外的 Roslyn 代码分析进程以及 进程，其名称具有可预测性，格式为 。 从首个公开发布的 2023.0 系列至 2026.0.x 版本，该组件使用 New
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一、 漏洞 CVE-2026-62848 基础信息
漏洞信息
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Vulnerability Title
Metalama's Visual Studio inter-process named pipe allows unsafe deserialization that enables local code execution
来源: CVE Program / CVE List V5
Vulnerability Description
Metalama is a Roslyn-based open-source patterns and architecture toolkit for C#. From 2023.0.101-rc until 2025.1.18, 2026.0.25 and 2026.1.19, the Windows Visual Studio integration deserializes local named-pipe messages without restricting which CLR types can be instantiated. The pipe connects `devenv`, the out-of-process Roslyn code-analysis process and the `CodeLens` process, and has the predictable name `Metalama_{role}_{processId}_{hash(PackageVersion)}`. Releases from the first public 2023.0 line through 2026.0.x use Newtonsoft.Json with `TypeNameHandling.All`; the later `SerializationBinder` only remaps assembly names, and `BindToType` resolves arbitrary wire-supplied types without an allow-list. Releases 2026.1.0 through 2026.1.18 use typeless MessagePack with `TypelessObjectResolver` and likewise instantiate arbitrary types. A same-user local process able to write to the pipe can send crafted messages that lead to arbitrary code execution with confidentiality, integrity and availability impacts inside the affected Visual Studio process. Default Windows pipe ACLs limit writers to the same logged-in user, so this does not escalate privileges or cross a security boundary; command-line and MSBuild-only builds do not use the channel. The maintained Metalama + PostSharp extension is affected from 2024.1 through 2026.1.4, while earlier Metalama-free PostSharp versions are unaffected. The retired Metalama and Caravela extensions remain affected and require removal or migration. The framework issue is fixed in versions 2025.1.18, 2026.0.25 and 2026.1.19; the maintained Metalama + PostSharp Visual Studio extension is fixed in version 2026.1.5. The retired Metalama and Caravela extensions require removal or migration.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-62848 的公开POC
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CVE-2026-62848 其他参考 (7)
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https://github.com/metalama/Metalama/pull/1651 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-h26j-4vp7-x9w2 x_refsource_CONFIRM