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

CVSS 9.1 · Critical EPSS 0.12% · P3

Affected Version Matrix 1

VendorProductVersion RangeStatus
med-unitedepa4all< 2026-05-20affected
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I. Basic Information for CVE-2026-48021

Vulnerability Information
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Vulnerability Title
epa4all Security Incident: Implement keystore based on Telematik TSL, implement hostname check and certificate check for lib-vau
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
med-unitedepa4all < 2026-05-20 -

II. Public POCs for CVE-2026-48021

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 9663 chars
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III. Intelligence Information for CVE-2026-48021

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Vendor Advisories for CVE-2026-48021 (2)

Other References for CVE-2026-48021 (1)

IV. Related Vulnerabilities

Same product: epa4all
Same vendor: med-united
Same weakness: CWE-295

V. Comments for CVE-2026-48021

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