CVE-2026-45248: Missing Authentication for Critical Function in hashgraph guardian
Hedera Guardian versions through 3. 5. 1 have an authentication bypass vulnerability in the GET /api/v1/demo/registered-users endpoint. This flaw allows unauthenticated attackers to retrieve sensitive user information including usernames, Hedera DIDs, parent registry DIDs, system roles, and policy role assignments. The vulnerability has a CVSS 4. 0 base score of 6. 9, indicating medium severity. No official patch or remediation guidance is currently available from the vendor. There are no known exploits in the wild at this time.
AI Analysis
Technical Summary
CVE-2026-45248 describes an authentication bypass vulnerability in Hedera Guardian (hashgraph) affecting versions through 3.5.1. The issue exists in the GET /api/v1/demo/registered-users endpoint, which does not require authentication, allowing attackers to access sensitive user data such as usernames, Hedera decentralized identifiers (DIDs), parent registry DIDs, system roles, and policy role assignments. The vulnerability has a CVSS 4.0 score of 6.9 (medium severity) with network attack vector, low complexity, no privileges required, and no user interaction needed. No official remediation or patch information is currently provided.
Potential Impact
Unauthenticated attackers can retrieve sensitive user information from the affected endpoint. This exposure includes usernames, Hedera DIDs, parent registry DIDs, system roles, and policy role assignments for all registered users, potentially aiding further targeted attacks or reconnaissance. There is no indication of direct system compromise or data modification from this vulnerability alone.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the vulnerable endpoint through network controls or API gateway policies to prevent unauthenticated access. Monitor for vendor updates regarding patches or official mitigations.
CVE-2026-45248: Missing Authentication for Critical Function in hashgraph guardian
Description
Hedera Guardian versions through 3. 5. 1 have an authentication bypass vulnerability in the GET /api/v1/demo/registered-users endpoint. This flaw allows unauthenticated attackers to retrieve sensitive user information including usernames, Hedera DIDs, parent registry DIDs, system roles, and policy role assignments. The vulnerability has a CVSS 4. 0 base score of 6. 9, indicating medium severity. No official patch or remediation guidance is currently available from the vendor. There are no known exploits in the wild at this time.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-45248 describes an authentication bypass vulnerability in Hedera Guardian (hashgraph) affecting versions through 3.5.1. The issue exists in the GET /api/v1/demo/registered-users endpoint, which does not require authentication, allowing attackers to access sensitive user data such as usernames, Hedera decentralized identifiers (DIDs), parent registry DIDs, system roles, and policy role assignments. The vulnerability has a CVSS 4.0 score of 6.9 (medium severity) with network attack vector, low complexity, no privileges required, and no user interaction needed. No official remediation or patch information is currently provided.
Potential Impact
Unauthenticated attackers can retrieve sensitive user information from the affected endpoint. This exposure includes usernames, Hedera DIDs, parent registry DIDs, system roles, and policy role assignments for all registered users, potentially aiding further targeted attacks or reconnaissance. There is no indication of direct system compromise or data modification from this vulnerability alone.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the vulnerable endpoint through network controls or API gateway policies to prevent unauthenticated access. Monitor for vendor updates regarding patches or official mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-05-11T14:14:49.613Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a0643eeec166c07b0159684
Added to database: 5/14/2026, 9:51:42 PM
Last enriched: 5/14/2026, 10:06:45 PM
Last updated: 5/14/2026, 11:07:47 PM
Views: 4
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