What is CVE-2026-44900?

CVE-2026-44900 is a high-severity vulnerability in Com.oviva.telematik Epa4all-client, classified under Improper Certificate Validation. CVSS score: 8.1/10. Published 2026-05-26.

How severe is CVE-2026-44900?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Com.oviva.telematik Epa4all-client

CVE-2026-44900

epa4all-client is the Java Client for epa4all / ePA 3.0 in the Telematik Infrastruktur. Prior to 1.2.1, in SignedPublicKeysTrustValidatorImpl.isTrusted(), the ECDSA signature verification at line 45 discards the boolean return value of Si…

Vulnerability class: Improper Certificate Validation

EPSS: 0.000 (0.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Com.oviva.telematik Epa4all-client — versions < 1.2.1
Oviva-ag Epa4all-client — versions < 1.2.1

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-44900?: CVE-2026-44900 is a high-severity vulnerability in Com.oviva.telematik Epa4all-client, classified under Improper Certificate Validation. CVSS score: 8.1/10. Published 2026-05-26.
How severe is CVE-2026-44900?: High severity. CVSS v3 base score is 8.1 out of 10.