How severe is CVE-2026-45248?

CVE-2026-45248 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-45248 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-45248?

CVE-2026-45248 affects Hedera Guardian. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-45248?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-45248 have an EU (EUVD) identifier?

Yes. CVE-2026-45248 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30494.

When was CVE-2026-45248 published?

CVE-2026-45248 was published on 2026-05-14 and last updated on 2026-06-17.

CVE-2026-45248

CVE-2026-45248 is a medium-severity vulnerability in Hedera Guardian with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-306.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v4: 6.9
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30494
Weakness: CWE-306
Affected product: Hedera Guardian
Published: 2026-05-14
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-45248?: 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.
How severe is CVE-2026-45248?: CVE-2026-45248 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-45248 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-45248?: CVE-2026-45248 affects Hedera Guardian. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-45248?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-45248 have an EU (EUVD) identifier?: Yes. CVE-2026-45248 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30494.
When was CVE-2026-45248 published?: CVE-2026-45248 was published on 2026-05-14 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:hedera:guardian:*:*:*:*:*:*:*:*

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