CVE-2026-35580

Emissary has GitHub Actions Shell Injection via Workflow Inputs

Published 7 Apr 2026Modified 26 Oct 2026CWE 77

In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

GHSA9.1CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Trivy's own label is CRITICAL. Rated critical by GHSA.

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.

Affected packages and fixed versions

Source	Package	Fixed in
maven::GitHub Security Advisory Maven	gov.nsa.emissary:emissary	8.39.0

References

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