How severe is CVE-2026-35571?

CVE-2026-35571 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-35571 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-35571?

CVE-2026-35571 affects Nsa Emissary. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-35571?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-35571 have an EU (EUVD) identifier?

Yes. CVE-2026-35571 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19724.

When was CVE-2026-35571 published?

CVE-2026-35571 was published on 2026-04-07 and last updated on 2026-06-17.

CVE-2026-35571

CVE-2026-35571 is a medium-severity vulnerability in Nsa Emissary with a CVSS 3.x base score of 4.8. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19724
Weakness: CWE-79
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, Mustache navigation templates interpolated configuration-controlled link values directly into href attributes without URL scheme validation. An administrator who could modify the navItems configuration could inject javascript: URIs, enabling stored cross-site scripting (XSS) against other authenticated users viewing the Emissary web interface. This vulnerability is fixed in 8.39.0.

Frequently asked questions

What is CVE-2026-35571?: Emissary is a P2P based data-driven workflow engine. Prior to 8.39.0, Mustache navigation templates interpolated configuration-controlled link values directly into href attributes without URL scheme validation. An administrator who could modify the navItems configuration could inject javascript: URIs, enabling stored cross-site scripting (XSS) against other authenticated users viewing the Emissary web interface. This vulnerability is fixed in 8.39.0.
How severe is CVE-2026-35571?: CVE-2026-35571 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-35571 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-35571?: CVE-2026-35571 affects Nsa Emissary. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-35571?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-35571 have an EU (EUVD) identifier?: Yes. CVE-2026-35571 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19724.
When was CVE-2026-35571 published?: CVE-2026-35571 was published on 2026-04-07 and last updated on 2026-06-17.

References

Affected products (1)

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

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