---
id: CVE-2026-45248
title: Hedera Guardian Authentication Bypass Information Disclosure
summary: >-
  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
  endpoi…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-306
vendor: hashgraph
product: guardian
affected:
  - guardian <= 3.5.1
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-05-16T01:07:26.744122Z'
published: '2026-05-14'
updated: '2026-11-08'
sourceUpdated: '2026-11-08T14:03:50.966Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-45248'
references:
  - url: 'https://github.com/hashgraph/guardian/pull/6076'
  - url: >-
      https://www.vulncheck.com/advisories/hedera-guardian-authentication-bypass-information-disclosure
tags:
  - cve.org
epss: 0.00356
epssPercentile: 0.295
ingestedAt: '2026-11-08T14:51:22.420Z'
---

## Overview

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.

## Affected

- `guardian <= 3.5.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.