CVE-2026-5749 HIGH

CVE-2026-5749: Inadequate access control vulnerability in Fullstep

Vendor Fullstep
Product Fullstep
Weakness CWE-306 · Missing auth
Published April 22, 2026
Last update April 22, 2026

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

Inadequate access control in the registration process in Fullstep V5, which could allow unauthenticated users to obtain a valid JWT token with which to interact with authenticated API resources. Successful exploitation of this vulnerability could allow an unauthenticated attacker to compromise the confidentiality of the affected resource, provided they have a valid token with which to interact with the API.

Key dates

02Disclosure timeline

April 22, 2026 CVE published
April 22, 2026 Record updated