CVE-2026-54442
Published:October 31, 2026
Updated:November 03, 2026
The URL validation regex "^(https?:/)?/.*" added to emissary's "NavAction.java" allows protocol-relative URLs ("//evil.com/...") and single-slash scheme variants ("http:/evil.com") to bypass validation, enabling SSRF and open redirect attacks.
Affected Packages
https://github.com/NationalSecurityAgency/emissary.git (GITHUB):
Affected version(s) >=8.0.0 <8.51.0Fix Suggestion:
Update to version 8.51.0gov.nsa.emissary:emissary (JAVA):
Affected version(s) >=8.0.0 <8.51.0Fix Suggestion:
Update to version 8.51.0Related Resources (5)
Do you need more information?
Contact UsCVSS v4
Base Score:
4.8
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
HIGH
User Interaction
PASSIVE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Server-Side Request Forgery