Description
epa4all-client is the Java Client for epa4all / ePA 3.0 in the Telematik Infrastruktur. Prior to 1.2.2, an attacker who can MITM the TLS connection between the client and the IDP (within the TI network) can substitute a forged discovery document. The forged document redirects uri_puk_idp_enc and uri_puk_idp_sig to attacker-controlled URLs. The client then encrypts the SMC-B-signed challenge response to the attacker's encryption key and POSTs it to the attacker's auth endpoint. This captures the signed authentication material. This vulnerability is fixed in 1.2.2.
Analysis
No analysis available yet.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| oviva-ag | epa4all-client | affected |
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| com.oviva.telematik | epa4all-client | affected |
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No data available yet.
Remediation
No remediation available yet.
Tracking
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Advisories
| Source | ID | Title |
|---|---|---|
 Github GHSA |
GHSA-gqx7-6552-67hf | Improper Verification of Cryptographic Signature in com.oviva.telematik:epa4all-client |
References
History
Tue, 26 May 2026 21:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | epa4all-client is the Java Client for epa4all / ePA 3.0 in the Telematik Infrastruktur. Prior to 1.2.2, an attacker who can MITM the TLS connection between the client and the IDP (within the TI network) can substitute a forged discovery document. The forged document redirects uri_puk_idp_enc and uri_puk_idp_sig to attacker-controlled URLs. The client then encrypts the SMC-B-signed challenge response to the attacker's encryption key and POSTs it to the attacker's auth endpoint. This captures the signed authentication material. This vulnerability is fixed in 1.2.2. | |
| Title | epa4all-client: Improper Verification of Cryptographic Signature | |
| Weaknesses | CWE-347 | |
| References |
| |
| Metrics |
cvssV3_1
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Subscriptions
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-05-26T21:01:51.745Z
Reserved: 2026-05-12T19:00:14.600Z
Link: CVE-2026-45575
Vulnrichment
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NVD
Status : Received
Published: 2026-05-26T21:16:40.373
Modified: 2026-05-26T21:16:40.373
Link: CVE-2026-45575
Redhat
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OpenCVE Enrichment
No data.
Weaknesses