NSA Emissary up to 8.38.x API Endpoint /api/configuration/ Name path traversal

Summaryinfo

A vulnerability was found in NSA Emissary up to 8.38.x. It has been rated as critical. This vulnerability affects unknown code of the file /api/configuration/ of the component API Endpoint. This manipulation of the argument Name causes path traversal. This vulnerability is handled as CVE-2026-35583. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in NSA Emissary up to 8.38.x. It has been declared as critical. Affected by this vulnerability is an unknown function of the file /api/configuration/ of the component API Endpoint. The manipulation of the argument name with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-35583 since 04/03/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 8.39.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-19732). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• NSA

Name

• Emissary

Version

• 8.0
• 8.1
• 8.2
• 8.3
• 8.4
• 8.5
• 8.6
• 8.7
• 8.8
• 8.9
• 8.10
• 8.11
• 8.12
• 8.13
• 8.14
• 8.15
• 8.16
• 8.17
• 8.18
• 8.19
• 8.20
• 8.21
• 8.22
• 8.23
• 8.24
• 8.25
• 8.26
• 8.27
• 8.28
• 8.29
• 8.30
• 8.31
• 8.32
• 8.33
• 8.34
• 8.35
• 8.36
• 8.37
• 8.38

CPE 2.3info

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CPE 2.2info

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