CVE-2026-35580
Emissary has GitHub Actions Shell Injection via Workflow Inputs
Vexday Risk Score
28Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 9.1EPSS 0.6%KEV nãoPoC —Patch —
Lifecycle
07 Apr 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Affected products
NationalSecurityAgency · emissaryWant to know if your infrastructure is exposed to this?
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