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CVE-2026-35580— Emissary has GitHub Actions Shell Injection via Workflow Inputs

Quick assessment

Affected
NationalSecurityAgency emissary
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.

Emissary是National Security Agency开源的一个分布式 P2P 数据驱动工作流框架。 Emissary 8.39.0之前版本存在命令注入漏洞，该漏洞源于GitHub Actions工作流文件存在shell注入点，用户控制的工作流输入通过${{ }}表达式语法直接插入shell命令，可能导致具有仓库写入权限的攻击者注入任意shell命令，导致仓库投毒和供应链攻击。

CVSS 9.1 · Critical EPSS 0.69% · P52
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I. Basic Information for CVE-2026-35580

Vulnerability Information
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Vulnerability Title
Emissary has GitHub Actions Shell Injection via Workflow Inputs
Source: CVE Program / CVE List V5
Vulnerability Description
Emissary is a P2P based data-driven workflow engine. Prior to 8.39.0, GitHub Actions workflow files contained shell injection points where user-controlled workflow_dispatch inputs were interpolated directly into shell commands via ${{ }} expression syntax. An attacker with repository write access could inject arbitrary shell commands, leading to repository poisoning and supply chain compromise affecting all downstream users. This vulnerability is fixed in 8.39.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在命令中使用的特殊元素转义处理不恰当(命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Emissary 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Emissary是National Security Agency开源的一个分布式 P2P 数据驱动工作流框架。 Emissary 8.39.0之前版本存在命令注入漏洞，该漏洞源于GitHub Actions工作流文件存在shell注入点，用户控制的工作流输入通过${{ }}表达式语法直接插入shell命令，可能导致具有仓库写入权限的攻击者注入任意shell命令，导致仓库投毒和供应链攻击。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
NationalSecurityAgency emissary < 8.39.0 -

II. Public POCs for CVE-2026-35580

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Qwen3.6-35B-A3B · 7500 chars
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III. Intelligence Information for CVE-2026-35580

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Vendor Advisories for CVE-2026-35580 (1)

Same Patch Batch · NationalSecurityAgency · 2026-04-07 · 4 CVEs total

CVE-2026-35581 7.2 HIGH Emissary has a Command Injection via PLACE_NAME Configuration in Executrix
CVE-2026-35583 5.3 MEDIUM Emissary has a Path Traversal via Blacklist Bypass in Configuration API
CVE-2026-35571 4.8 MEDIUM Emissary has Stored XSS via Navigation Template Link Injection

IV. Related Vulnerabilities

Same product: emissary
Same vendor: NationalSecurityAgency
Same weakness: CWE-77

V. Comments for CVE-2026-35580

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