{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-9058", "assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "state": "PUBLISHED", "assignerShortName": "CERT-PL", "dateReserved": "2026-05-20T06:36:10.929Z", "datePublished": "2026-05-25T13:23:09.157Z", "dateUpdated": "2026-05-25T13:23:09.157Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "Szafir SDK", "vendor": "Krajowa Izba Rozliczeniowa", "versions": [{"lessThan": "463", "status": "affected", "version": "0", "versionType": "custom"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Micha\u0142 Leszczy\u0144ski (icedev.pl)"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<span style=\"background-color: rgb(255, 255, 255);\">Szafir SDK returns a success status code from the cryptographic digital signature verification process (i.e. <i>/VerifyingTaskItem/Signature/VerificationResult/Result/@code == 0,</i> \"Positively verified\") even when the trust status of the signer's certificate could not be established (i.e. <i>/VerifyingTaskItem/Signature/VerificationResult/SigningCertificate/@certificateType == \"nondetermined\")</i>. This causes consuming applications to incorrectly treat the signature as valid despite an unverified certificate chain, enabling authentication bypass and user impersonation.<br></span><br>This issue was fixed in version <span style=\"background-color: rgb(255, 255, 255);\">463</span>."}], "value": "Szafir SDK returns a success status code from the cryptographic digital signature verification process (i.e. /VerifyingTaskItem/Signature/VerificationResult/Result/@code == 0, \"Positively verified\") even when the trust status of the signer's certificate could not be established (i.e. /VerifyingTaskItem/Signature/VerificationResult/SigningCertificate/@certificateType == \"nondetermined\"). This causes consuming applications to incorrectly treat the signature as valid despite an unverified certificate chain, enabling authentication bypass and user impersonation.\n\nThis issue was fixed in version 463."}], "impacts": [{"capecId": "CAPEC-115", "descriptions": [{"lang": "en", "value": "CAPEC-115 Authentication Bypass"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 9.3, "baseSeverity": "CRITICAL", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-637", "description": "CWE-637 Unnecessary Complexity in Protection Mechanism (Not Using 'Economy of Mechanism')", "lang": "en", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-393", "description": "CWE-393: Return of Wrong Status Code", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "shortName": "CERT-PL", "dateUpdated": "2026-05-25T13:23:09.157Z"}, "references": [{"tags": ["third-party-advisory"], "url": "https://cert.pl/posts/2026/05/CVE-2026-9058"}, {"tags": ["product"], "url": "https://www.elektronicznypodpis.pl/"}], "source": {"discovery": "EXTERNAL"}, "title": "Improper Certificate Verification in Szafir SDK", "x_generator": {"engine": "Vulnogram 0.2.0"}}}}

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