What is CVE-2026-35581?

CVE-2026-35581 is a high-severity vulnerability in Nationalsecurityagency Emissary, classified under OS Command Injection. CVSS score: 7.2/10. Published 2026-04-07.

How severe is CVE-2026-35581?

High severity. CVSS v3 base score is 7.2 out of 10.

RCE in Nationalsecurityagency Emissary

CVE-2026-35581

Emissary is a P2P based data-driven workflow engine. Prior to 8.39.0, the Executrix utility class constructed shell commands by concatenating configuration-derived values — including the PLACE_NAME parameter — with insufficient sanitization. Only spaces were replaced with underscores, allowing shell metacharacters (;, |, $, `, (, ), etc.) to pass through into /bin/sh -c command execution. This vulnerability is fixed in 8.39.0.

Vulnerability class: Command Injection (OS Command Injection)

Published 2026-04-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (58.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.009 · change: +0.003

Affected products

Nationalsecurityagency Emissary — versions < 8.39.0
Nsa Emissary

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

github.com/NationalSecurityAgency/emissary/security/advisories/GHSA-6c37-7w4p-j… (Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-35581?: CVE-2026-35581 is a high-severity vulnerability in Nationalsecurityagency Emissary, classified under OS Command Injection. CVSS score: 7.2/10. Published 2026-04-07.
How severe is CVE-2026-35581?: High severity. CVSS v3 base score is 7.2 out of 10.