Critical severity9.1NVD Advisory· Published Apr 7, 2026· Updated Apr 16, 2026
CVE-2026-35580
CVE-2026-35580
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
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
gov.nsa.emissary:emissaryMaven | < 8.39.0 | 8.39.0 |
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
5- github.com/NationalSecurityAgency/emissary/pull/1286nvdPatchWEB
- github.com/NationalSecurityAgency/emissary/pull/1288nvdPatchWEB
- github.com/NationalSecurityAgency/emissary/security/advisories/GHSA-3g6g-gq4r-xjm9nvdExploitVendor AdvisoryWEB
- github.com/advisories/GHSA-3g6g-gq4r-xjm9ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-35580ghsaADVISORY
News mentions
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