What’s Vulnerable › Vulnerabilities

CVE-2026-48021: epa4all Security Incident: Implement keystore based on Telematik TSL, implement hostname check and certificate check for lib-vau

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-24 · updated 2026-10-24
• Weakness: CWE-295

Description

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.

Affected products

• med-united epa4all: before 2026-05-20

References

• https://github.com/med-united/epa4all/releases/tag/2026-05-20
• https://github.com/med-united/epa4all/security/advisories/GHSA-vvh7-x6c7-46gh
• https://www.machinespirits.com/advisory/aa49f0

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