CVE-2026-9058

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In such a case, Szafir SDK returns a success status code of 0 (\"Positively verified\") upon successful cryptographic verification and a certificate status of \"nonqualified\".\n\nFor other types of untrusted certificates, Szafir SDK returns a success status code of 0 (\"Positively verified\") upon successful cryptographic verification and a certificate status of \"nondetermined\".\n\nThis may lead integrating applications to incorrectly treat the digital signature as valid despite an untrusted certificate chain. This flaw enables authentication bypass and user impersonation:\n(1) in use-cases other than qualified certificate authentication, or\n(2) if the qualified certificate authentication use-case is not correctly implemented by the integrating application.\n\nThis issue was fixed in version 1.8.463.2.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<span>For untrusted certificates that contain the \"Authority Information Access - caIssuers URI\" extension, Szafir SDK will automatically download the parent CA certificate from the specified URL and will import it to its trust store as a \"nonqualified\" certificate. In such a case, Szafir SDK returns a success status code of 0 (\"Positively verified\") upon successful cryptographic verification and a certificate status of \"nonqualified\".<br><br>For other types of untrusted certificates, Szafir SDK returns a success status code of 0 (\"Positively verified\") upon successful cryptographic verification and a certificate status of \"nondetermined\".<br><br>This may lead integrating applications to incorrectly treat the digital signature as valid despite an untrusted certificate chain. This flaw enables authentication bypass and user impersonation:<br>(1) in use-cases other than qualified certificate authentication, or<br>(2) if the qualified certificate authentication use-case is not correctly implemented by the integrating application.<br></span><br>This issue was fixed in version <span>1.8.463.2</span>."}]}], "references": [{"url": "https://cert.pl/posts/2026/05/CVE-2026-9058", "tags": ["third-party-advisory"]}, {"url": "https://www.elektronicznypodpis.pl/", "tags": ["product"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "CRITICAL", "baseScore": 9.3, "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"}}], "credits": [{"lang": "en", "value": "Micha\u0142 Leszczy\u0144ski (icedev.pl)", "type": "finder"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-26T15:57:55.171237Z", "id": "CVE-2026-9058", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-26T15:58:01.602Z"}}]}}

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In such a case, Szafir SDK returns a success status code of 0 (\"Positively verified\") upon successful cryptographic verification and a certificate status of \"nonqualified\".\n\nFor other types of untrusted certificates, Szafir SDK returns a success status code of 0 (\"Positively verified\") upon successful cryptographic verification and a certificate status of \"nondetermined\".\n\nThis may lead integrating applications to incorrectly treat the digital signature as valid despite an untrusted certificate chain. This flaw enables authentication bypass and user impersonation:\n(1) in use-cases other than qualified certificate authentication, or\n(2) if the qualified certificate authentication use-case is not correctly implemented by the integrating application.\n\nThis issue was fixed in version 1.8.463.2.", "supportingMedia": [{"type": "text/html", "value": "<span>For untrusted certificates that contain the \"Authority Information Access - caIssuers URI\" extension, Szafir SDK will automatically download the parent CA certificate from the specified URL and will import it to its trust store as a \"nonqualified\" certificate. In such a case, Szafir SDK returns a success status code of 0 (\"Positively verified\") upon successful cryptographic verification and a certificate status of \"nonqualified\".<br><br>For other types of untrusted certificates, Szafir SDK returns a success status code of 0 (\"Positively verified\") upon successful cryptographic verification and a certificate status of \"nondetermined\".<br><br>This may lead integrating applications to incorrectly treat the digital signature as valid despite an untrusted certificate chain. This flaw enables authentication bypass and user impersonation:<br>(1) in use-cases other than qualified certificate authentication, or<br>(2) if the qualified certificate authentication use-case is not correctly implemented by the integrating application.<br></span><br>This issue was fixed in version <span>1.8.463.2</span>.", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-637", "description": "CWE-637 Unnecessary Complexity in Protection Mechanism (Not Using 'Economy of Mechanism')"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-393", "description": "CWE-393: Return of Wrong Status Code"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-295", "description": "CWE-295 Improper Certificate Validation"}]}], "providerMetadata": {"orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "shortName": "CERT-PL", "dateUpdated": "2026-07-23T12:00:31.927Z"}}}, "cveMetadata": {"cveId": "CVE-2026-9058", "state": "PUBLISHED", "dateUpdated": "2026-07-23T12:00:31.927Z", "dateReserved": "2026-05-20T06:36:10.929Z", "assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "datePublished": "2026-05-25T13:23:09.157Z", "assignerShortName": "CERT-PL"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Szafir SDK", "vendor": "Krajowa Izba Rozliczeniowa", "versions": [{"lessThan": "1.8.463.2", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "cvd@cert.pl"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "For untrusted certificates that contain the \"Authority Information Access - caIssuers URI\" extension, Szafir SDK will automatically download the parent CA certificate from the specified URL and will import it to its trust store as a \"nonqualified\" certificate. In such a case, Szafir SDK returns a success status code of 0 (\"Positively verified\") upon successful cryptographic verification and a certificate status of \"nonqualified\".\n\nFor other types of untrusted certificates, Szafir SDK returns a success status code of 0 (\"Positively verified\") upon successful cryptographic verification and a certificate status of \"nondetermined\".\n\nThis may lead integrating applications to incorrectly treat the digital signature as valid despite an untrusted certificate chain. This flaw enables authentication bypass and user impersonation:\n(1) in use-cases other than qualified certificate authentication, or\n(2) if the qualified certificate authentication use-case is not correctly implemented by the integrating application.\n\nThis issue was fixed in version 1.8.463.2."}, {"lang": "es", "value": "El SDK de Szafir devuelve un c\u00f3digo de estado de \u00e9xito del proceso de verificaci\u00f3n de firma digital criptogr\u00e1fica (es decir, /VerifyingTaskItem/Signature/VerificationResult/Result/@code == 0, 'Verificado positivamente') incluso cuando el estado de confianza del certificado del firmante no pudo establecerse (es decir, /VerifyingTaskItem/Signature/VerificationResult/SigningCertificate/@certificateType == 'nondetermined'). Esto provoca que las aplicaciones consumidoras traten incorrectamente la firma como v\u00e1lida a pesar de una cadena de certificados no verificada, lo que permite la omisi\u00f3n de autenticaci\u00f3n y la suplantaci\u00f3n de identidad de usuario.\n\nEste problema se solucion\u00f3 en la versi\u00f3n 463."}], "id": "CVE-2026-9058", "lastModified": "2026-07-23T12:18:52.540", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.3, "baseSeverity": "CRITICAL", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cvd@cert.pl", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-9058", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-05-26T15:57:55.171237Z", "version": "2.0.3"}}]}, "published": "2026-05-25T14:16:27.977", "references": [{"source": "cvd@cert.pl", "url": "https://cert.pl/posts/2026/05/CVE-2026-9058"}, {"source": "cvd@cert.pl", "url": "https://www.elektronicznypodpis.pl/"}], "sourceIdentifier": "cvd@cert.pl", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-295"}, {"lang": "en", "value": "CWE-393"}, {"lang": "en", "value": "CWE-637"}], "source": "cvd@cert.pl", "type": "Primary"}]}

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