How severe is CVE-2026-35583?

CVE-2026-35583 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-35583 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-35583?

CVE-2026-35583 affects Nsa Emissary. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-35583?

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

Does CVE-2026-35583 have an EU (EUVD) identifier?

Yes. CVE-2026-35583 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19732.

When was CVE-2026-35583 published?

CVE-2026-35583 was published on 2026-04-07 and last updated on 2026-06-17.

CVE-2026-35583

CVE-2026-35583 is a medium-severity vulnerability in Nsa Emissary with a CVSS 3.x base score of 5.3. 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-22.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19732
Weakness: CWE-22
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 configuration API endpoint (/api/configuration/{name}) validated configuration names using a blacklist approach that checked for \, /, .., and trailing .. This could potentially be bypassed using URL-encoded variants, double-encoding, or Unicode normalization to achieve path traversal and read configuration files outside the intended directory. This vulnerability is fixed in 8.39.0.

Frequently asked questions

What is CVE-2026-35583?: Emissary is a P2P based data-driven workflow engine. Prior to 8.39.0, the configuration API endpoint (/api/configuration/{name}) validated configuration names using a blacklist approach that checked for \, /, .., and trailing .. This could potentially be bypassed using URL-encoded variants, double-encoding, or Unicode normalization to achieve path traversal and read configuration files outside the intended directory. This vulnerability is fixed in 8.39.0.
How severe is CVE-2026-35583?: CVE-2026-35583 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-35583 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-35583?: CVE-2026-35583 affects Nsa Emissary. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-35583?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-35583 have an EU (EUVD) identifier?: Yes. CVE-2026-35583 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19732.
When was CVE-2026-35583 published?: CVE-2026-35583 was published on 2026-04-07 and last updated on 2026-06-17.

References

https://github.com/NationalSecurityAgency/emissary/security/advisories/GHSA-hxf2-gm22-7vcm

Affected products (1)

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

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