Home→Vulnerabilities→CVE-2026-5749
Disclosed

CVE-2026-5749

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.

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Exploitation Probability (EPSS)

Low Priority
0.07%

The Exploit Prediction Scoring System (EPSS) uses machine learning to estimate the probability that a vulnerability will be exploited in the wild within the next 30 days.

0% (Theoretical)100% (Certainty)

7-Day Exploitation Trend

Vulnerability Timeline

2 events
Apr 22, 2026
Vulnerability Disclosed
Published to component-level vulnerability database.
Apr 22, 2026
Last Updated
Record updated with new analysis or tags.

Threat Actor Attribution

PREMIUM INTEL
Associated Groups:Lazarus Group, APT28
Ransomware Campaigns:LockBit 3.0, BlackCat
IoCs (Indicators):14 IPs, 3 Hashes

Remediation & Mitigation

SOLUTION

Official patches and mitigation steps are available for this vulnerability.

# Update Command
apt-get update && apt-get upgrade -y specific-package
# Verify installation
dpkg -l | grep package-name

References

https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-fullstepIncibe

Am I Vulnerable?

Check your domain or package.json for CVE-2026-5749 exposure.

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Vulnerability Details

CVSS Base Score
N/A/ 10
Published Date
Apr 22, 2026
Last Modified
Apr 22, 2026
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