PatchTheCVECVE-2026-45248: Hedera Guardian through 3.5.1 contains an authentication bypass vulnerability in the GET /api/v1/demo/register
CVE-2026-45248 is a medium-severity flaw (CVSS 5.3) affecting guardian. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 71%) |
| CISA exploited list | No |
| Weakness | CWE-306 |
| Published | 2026-05-14 |
| Last modified | 2026-10-26 |
Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-45248?
guardian: upgrade to newer than 3.5.1. Exact commands for each OS are on this page.
Is CVE-2026-45248 being exploited?
CVE-2026-45248 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-45248 affect?
CVE-2026-45248 affects guardian. Severity is medium (CVSS 5.3). 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
How urgent is CVE-2026-45248?
Priority 31/100. Remotely exploitable, no login, no user action
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