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Advisory record · GHSA-3g6g-gq4r-xjm9

Emissary has GitHub Actions Shell Injection via Workflow Inputs

CVSS 9.1 CriticalCriticalEPSS 0.0058 · 47th percentile

Critical, because:

  • CVSS score 9.1: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 8 Apr 2026, 00:12 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
gov.nsa.emissary:emissaryMaven<8.39.08.39.0
Identifiers
GHSA-3g6g-gq4r-xjm9 · CVE-2026-35580
Weakness (CWE)
CWE-77
Tags
Published
8 Apr 2026
Updated
8 Apr 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Emissary versions before 8.39.0 (Maven package gov.nsa.emissary:emissary) have shell injection flaws in three GitHub Actions workflow files, where workflow_dispatch inputs were placed directly into shell commands. An attacker with repository write access could run arbitrary shell commands in the CI/CD runner and modify the repository. Upgrade to version 8.39.0, which adds environment variable indirection and input validation; the source lists no workaround other than upgrading.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.1 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0058, the 47th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:20 UTC First seen by agentprime
  2. 31 Oct 2026, 14:20 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.