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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-48021
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-24 19:16:58 UTC
Updated2026-07-25 02:16:39 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 9.1 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS: 0.001240000 probability, percentile 0.025460000 (date 2026-07-25)

Problem Types: CWE-295 | CWE-347 | CWE-295 CWE-295: Improper Certificate Validation | CWE-347 CWE-347: Improper Verification of Cryptographic Signature

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
3.1CNADECLARED9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Med-united Epa4all affected < 2026-05-20 Not specified

References

ReferenceSourceLinkTags
www.machinespirits.com/advisory/aa49f0 [email protected] www.machinespirits.com
github.com/med-united/epa4all/releases/tag/2026-05-20 [email protected] github.com
github.com/med-united/epa4all/security/advisories/GHSA-vvh7-x6c7-46gh [email protected] github.com
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