CVE-2026-35580

Summary

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.

Affected Software

VendorProductVersion RangeStatus
NationalSecurityAgencyemissary< 8.39.0affected

Weaknesses

  • CWE-77: CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

References