CVE-2026-45248

MEDIUM 5.3

Hedera Guardian Authentication Bypass Information Disclosure

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

Hedera Guardian through 3.5.1 contains an authentication bypass vulnerability in the GET /api/v1/demo/registered-users endpoint that allows unauthenticated attackers to retrieve sensitive user information. Attackers can access the endpoint without providing authentication credentials to obtain usernames, Hedera DIDs, parent registry DIDs, system roles, and policy role assignments for all registered users in the system.

CWE	CWE-306
Vendor	hashgraph
Product	guardian
Published	May 14, 2026

Stay Ahead of the Next One

Get instant alerts for hashgraph guardian

Be the first to know when new medium vulnerabilities affecting hashgraph guardian are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

hashgraph / guardian

0 ≤ 3.5.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/hashgraph/guardian/pull/6076 vulncheck.com: https://www.vulncheck.com/advisories/hedera-guardian-authentication-bypass-information-disclosure

Credits

Christ Bouchuen