CVE-2026-45248 Hedera Guardian Authentication Bypass Information Disclosure
Unauthenticated attackers can access a specific API endpoint to retrieve sensitive user information, including usernames and roles, from Hedera Guardian.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-45248?
CVE-2026-45248 is a medium-severity authentication bypass vulnerability in hashgraph guardian, published on 14 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-306
Which versions are affected by CVE-2026-45248?
It affects 1 product.
Products include Hedera Guardian.
How do I fix CVE-2026-45248?
No fix has been published for CVE-2026-45248 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-45248 being exploited?
There is no known exploitation of CVE-2026-45248 in the wild and no public exploit code.
Other vulnerabilities in hashgraph guardian
Sources
Also known as GHSA-5v4v-3g9q-mh5j.