Vulnerability in Med-United Epa4all
CVE-2026-48021
In epa4all, prior to version 2026-05-20, an attacker who can intercept the TLS connection between epa4all and the ePA backend can complete the VAU handshake with attacker-controlled keys and obtain the session encryption keys. All inner HTTP traffic (patient consent decisions, medication data, document operations, authorization tokens, and entitlement queries) becomes readable and modifiable. The attacker can also inject arbitrary requests through the hijacked channel. This issue has been patched in version 2026-05-20.
Vulnerability class: Improper Certificate Validation
EPSS: 0.001 (2.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Med-united Epa4all — versions < 2026-05-20
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-48021?
- CVE-2026-48021 is a critical-severity vulnerability in Med-United Epa4all, classified under Improper Certificate Validation. CVSS score: 9.1/10. Published 2026-07-24.
- How severe is CVE-2026-48021?
- Critical severity. CVSS v3 base score is 9.1 out of 10.