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CVE-2026-44900

epa4all-client is the Java Client for epa4all / ePA 3.0 in the Telematik Infrastruktur. Prior to 1.2.1, in SignedPublicKeysTrustValidatorImpl.isTrusted(), the ECDSA signature verification at line 45 discards the boolean return value of Signature.verify(). The method performs certificate chain validation, OCSP check, and signature algorithm setup, but never checks whether the signature actually matches. For any structurally valid signature, it returns true. This vulnerability is fixed in 1.2.1.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e67fc5e31493c13e8e754c50f8a2814a67b8934619fc1274963378ffffd69e0a
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"product":"epa4all-client","vendor":"oviva-ag","versions":[{"status":"affected","version":"< 1.2.1"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:930019179a3b2af5169d2cf12794b557d408f855ea1de06d658002c6778d95e9 · sha256:20ccf38a3c5b6a90… · /containers/cna/affected/0

{"product":"epa4all-client","vendor":"com.oviva.telematik","versions":[{"status":"affected","version":"< 1.2.1"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:930019179a3b2af5169d2cf12794b557d408f855ea1de06d658002c6778d95e9 · sha256:20ccf38a3c5b6a90… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"product":"epa4all-client","vendor":"oviva-ag","versions":[{"status":"affected","version":"< 1.2.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:930019179a3b2af5169d2cf12794b557d408f855ea1de06d658002c6778d95e9 · sha256:20ccf38a3c5b6a90… · /containers/cna/affected/0
{"product":"epa4all-client","vendor":"com.oviva.telematik","versions":[{"status":"affected","version":"< 1.2.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:930019179a3b2af5169d2cf12794b557d408f855ea1de06d658002c6778d95e9 · sha256:20ccf38a3c5b6a90… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:930019179a3b2af5169d2cf12794b557d408f855ea1de06d658002c6778d95e9 · sha256:20ccf38a3c5b6a90… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-295","description":"CWE-295: Improper Certificate Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:930019179a3b2af5169d2cf12794b557d408f855ea1de06d658002c6778d95e9 · sha256:20ccf38a3c5b6a90… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/oviva-ag/epa4all-client/pull/34","tags":["x_refsource_MISC"],"url":"https://github.com/oviva-ag/epa4all-client/pull/34"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:930019179a3b2af5169d2cf12794b557d408f855ea1de06d658002c6778d95e9 · sha256:20ccf38a3c5b6a90… · /containers/cna/references/1
{"name":"https://github.com/oviva-ag/epa4all-client/security/advisories/GHSA-g8r3-5hwf-qp96","tags":["x_refsource_CONFIRM"],"url":"https://github.com/oviva-ag/epa4all-client/security/advisories/GHSA-g8r3-5hwf-qp96"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:930019179a3b2af5169d2cf12794b557d408f855ea1de06d658002c6778d95e9 · sha256:20ccf38a3c5b6a90… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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