Is CVE-2026-5749 actively exploited?

No active exploitation of CVE-2026-5749 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-5749 be exploited remotely?

Yes. CVE-2026-5749 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-5749?

CVE-2026-5749 has a CVSS score of 8.7 (HIGH).

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HIGH

CVE-2026-5749

CWE-306Published: April 22, 2026· Updated: Apr 22, 2026

8.7

CVSS v3.1

EPSS:0.05%probability of exploitation in 30 daysPercentile:15.4th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-5749 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X