{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-26927", "assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "state": "PUBLISHED", "assignerShortName": "CERT-PL", "dateReserved": "2026-02-16T09:01:03.142Z", "datePublished": "2026-04-02T14:01:39.075Z", "dateUpdated": "2026-04-02T14:19:19.180Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "Szafir SDK Web", "vendor": "Krajowa Izba Rozliczeniowa", "versions": [{"lessThan": "0.0.17.4", "status": "affected", "version": "0", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Micha\u0142 Leszczy\u0144ski"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<span style=\"background-color: rgb(255, 255, 255);\">Szafir SDK Web</span> is a browser plug-in that can run SzafirHost application which download the necessary files when launched.<br>In <span style=\"background-color: rgb(255, 255, 255);\">Szafir SDK Web</span> it is possible to change the URL (HTTP Origin) of the application call location. <span style=\"background-color: rgb(255, 255, 255);\">An unauthenticated attacker can craft a website that is able to launch SzafirHost application with arbitrary arguments via</span><span style=\"background-color: rgb(255, 255, 255);\">&nbsp;<span style=\"background-color: rgb(255, 255, 255);\">Szafir SDK Web</span> browser addon.</span><span style=\"background-color: rgb(255, 255, 255);\">&nbsp;No validation will be performed to check whether the address specified in `document_base_url` parameter is in any way related to the actual address of the calling web application. 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When victim accepts the application execution for the URL showed in the confirmation prompt with the \"remember\" option before, the prompt won't be shown and the application will be called in the context of URL provided by the attacker\u00a0without any interaction.\n\nThis issue was fixed in version 0.0.17.4."}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 5.1, "baseSeverity": "MEDIUM", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-348", "description": "CWE-348 Use of Less Trusted Source", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "shortName": "CERT-PL", "dateUpdated": "2026-04-02T14:01:39.075Z"}, "references": [{"tags": ["third-party-advisory"], "url": "https://cert.pl/posts/2026/04/CVE-2026-26927"}, {"tags": ["product"], "url": "https://www.elektronicznypodpis.pl/"}], "source": {"discovery": "EXTERNAL"}, "title": "URL (HTTP Origin) call location spoofing in Szafir SDK Web", "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-02T14:19:08.706495Z", "id": "CVE-2026-26927", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-02T14:19:19.180Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-26927", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-02T14:19:08.706495Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-02T14:19:13.159Z"}}], "cna": {"title": "URL (HTTP Origin) call location spoofing in Szafir SDK Web", "source": {"discovery": "EXTERNAL"}, "credits": [{"lang": "en", "type": "finder", "value": "Micha\u0142 Leszczy\u0144ski"}], "metrics": [{"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 5.1, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N", "providerUrgency": "NOT_DEFINED", "userInteraction": "ACTIVE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Krajowa Izba Rozliczeniowa", "product": "Szafir SDK Web", "versions": [{"status": "affected", "version": "0", "lessThan": "0.0.17.4", "versionType": "semver"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://cert.pl/posts/2026/04/CVE-2026-26927", "tags": ["third-party-advisory"]}, {"url": "https://www.elektronicznypodpis.pl/", "tags": ["product"]}], "x_generator": {"engine": "Vulnogram 0.2.0"}, "descriptions": [{"lang": "en", "value": "Szafir SDK Web is a browser plug-in that can run SzafirHost application which download the necessary files when launched.\nIn Szafir SDK Web it is possible to change the URL (HTTP Origin) of the application call location. An unauthenticated attacker can craft a website that is able to launch SzafirHost application with arbitrary arguments via\u00a0Szafir SDK Web browser addon.\u00a0No validation will be performed to check whether the address specified in `document_base_url` parameter is in any way related to the actual address of the calling web application. The URL address specified in `document_base_url` parameter is then shown\u00a0in the application confirmation prompt. When a victim confirms the execution of the application, it will be called in the context of attacker's website URL and might download additional files and libraries from that website. When victim accepts the application execution for the URL showed in the confirmation prompt with the \"remember\" option before, the prompt won't be shown and the application will be called in the context of URL provided by the attacker\u00a0without any interaction.\n\nThis issue was fixed in version 0.0.17.4.", "supportingMedia": [{"type": "text/html", "value": "<span style=\"background-color: rgb(255, 255, 255);\">Szafir SDK Web</span> is a browser plug-in that can run SzafirHost application which download the necessary files when launched.<br>In <span style=\"background-color: rgb(255, 255, 255);\">Szafir SDK Web</span> it is possible to change the URL (HTTP Origin) of the application call location. <span style=\"background-color: rgb(255, 255, 255);\">An unauthenticated attacker can craft a website that is able to launch SzafirHost application with arbitrary arguments via</span><span style=\"background-color: rgb(255, 255, 255);\">&nbsp;<span style=\"background-color: rgb(255, 255, 255);\">Szafir SDK Web</span> browser addon.</span><span style=\"background-color: rgb(255, 255, 255);\">&nbsp;No validation will be performed to check whether the address specified in `document_base_url` parameter is in any way related to the actual address of the calling web application. 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{"cveTags": [], "descriptions": [{"lang": "en", "value": "Szafir SDK Web is a browser plug-in that can run SzafirHost application which download the necessary files when launched.\nIn Szafir SDK Web it is possible to change the URL (HTTP Origin) of the application call location. An unauthenticated attacker can craft a website that is able to launch SzafirHost application with arbitrary arguments via\u00a0Szafir SDK Web browser addon.\u00a0No validation will be performed to check whether the address specified in `document_base_url` parameter is in any way related to the actual address of the calling web application. The URL address specified in `document_base_url` parameter is then shown\u00a0in the application confirmation prompt. When a victim confirms the execution of the application, it will be called in the context of attacker's website URL and might download additional files and libraries from that website. When victim accepts the application execution for the URL showed in the confirmation prompt with the \"remember\" option before, the prompt won't be shown and the application will be called in the context of URL provided by the attacker\u00a0without any interaction.\n\nThis issue was fixed in version 0.0.17.4."}], "id": "CVE-2026-26927", "lastModified": "2026-04-02T14:16:25.873", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.1, "baseSeverity": "MEDIUM", "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": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/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": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cvd@cert.pl", "type": "Secondary"}]}, "published": "2026-04-02T14:16:25.873", "references": [{"source": "cvd@cert.pl", "url": "https://cert.pl/posts/2026/04/CVE-2026-26927"}, {"source": "cvd@cert.pl", "url": "https://www.elektronicznypodpis.pl/"}], "sourceIdentifier": "cvd@cert.pl", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-348"}], "source": "cvd@cert.pl", "type": "Primary"}]}

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