How severe is CVE-2026-35581?

CVE-2026-35581 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-35581 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-35581?

CVE-2026-35581 affects Nsa Emissary. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-35581?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-35581 have an EU (EUVD) identifier?

Yes. CVE-2026-35581 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19730.

When was CVE-2026-35581 published?

CVE-2026-35581 was published on 2026-04-07 and last updated on 2026-06-17.

CVE-2026-35581

CVE-2026-35581 is a high-severity vulnerability in Nsa Emissary with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19730
Weakness: CWE-78
Affected product: Nsa Emissary
Published: 2026-04-07
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-35581?: CVE-2026-35581 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-35581 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-35581?: CVE-2026-35581 affects Nsa Emissary. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-35581?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-35581 have an EU (EUVD) identifier?: Yes. CVE-2026-35581 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19730.
When was CVE-2026-35581 published?: CVE-2026-35581 was published on 2026-04-07 and last updated on 2026-06-17.

References

https://github.com/NationalSecurityAgency/emissary/security/advisories/GHSA-6c37-7w4p-jg9v

Affected products (1)

cpe:2.3:a:nsa:emissary:*:*:*:*:*:*:*:*

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