CVE-2026-54442 | BDVDB-2026-400481 Detail

NationalSecurityAgencyemissary

Description#

Emissary is a P2P based data-driven workflow engine. Prior to 8.51.0, the VALID_LINK validation in src/main/java/emissary/server/mvc/NavAction.java accepts protocol-relative URLs when processing configured navigation links. Browser URL normalization can interpret these accepted strings as external origins. The authoritative advisory attributes open redirect, server-side request forgery, and cloud metadata access to this bypass, but it identifies neither the server-side dereference path nor how navigation-link processing reaches that path. This issue is fixed in version 8.51.0.

Impact#

Per CVSS v3.1: confidentiality impact low, integrity impact low, availability impact none. Attack vector: network.

Weaknesses#

CWE-918 Server-Side Request Forgery (SSRF)

References#

Exploit#

No public exploit known

History#

Version 12026-11-05Record published in the CVE List.

Published

Published: 2026-11-05
Last modified: 2026-11-05

Vendor information

Vendor: NationalSecurityAgency
Product: emissary

All NationalSecurityAgency vulnerabilities

Score

4.8 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 29.1.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Server-Side Request Forgery

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
< 8.51.0
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

4.8 Medium

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	High
User Interaction	Required
Scope	Changed
Confidentiality	Low
Integrity	Low
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).