{"id":"CVE-2026-44088","state":"PUBLISHED","title":"Remote Code Execution in SzafirHost","description":"SzafirHost verifies the signature of the downloaded JAR file using class JarInputStream (reading from the beginning of the file), but loads classes using class JarFile/URLClassLoader (reading the Central Directory from the end). It can lead to remote code execution by allowing an attacker to combine a genuine, signed JAR file with a malicious ZIP file, causing the verification to pass but the malicious class to be loaded.\n\n\nThis issue was fixed in version 1.2.1.","publishedAt":"2026-05-15T08:48:11.694Z","updatedAt":"2026-05-15T11:07:58.948Z","severity":{"score":8.6,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L","source":"CERT-PL"},"assigner":"CERT-PL","products":["Krajowa Izba Rozliczeniowa SzafirHost"],"affected":[{"vendor":"Krajowa Izba Rozliczeniowa","product":"SzafirHost","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.2.1","versionType":"semver"}]}],"references":["https://cert.pl/posts/2026/05/CVE-2026-44088","https://www.elektronicznypodpis.pl/"],"weaknesses":["CWE-434"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/44xxx/CVE-2026-44088.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-44088","state":"PUBLISHED","datePublished":"2026-05-15T08:48:11.694Z","dateUpdated":"2026-05-15T11:07:58.948Z","assignerShortName":"CERT-PL","assignerOrgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateReserved":"2026-05-05T09:40:05.100Z"},"containers":{"cna":{"title":"Remote Code Execution in SzafirHost","descriptions":[{"lang":"en","value":"SzafirHost verifies the signature of the downloaded JAR file using class JarInputStream (reading from the beginning of the file), but loads classes using class JarFile/URLClassLoader (reading the Central Directory from the end). It can lead to remote code execution by allowing an attacker to combine a genuine, signed JAR file with a malicious ZIP file, causing the verification to pass but the malicious class to be loaded.\n\n\nThis issue was fixed in version 1.2.1."}],"affected":[{"vendor":"Krajowa Izba Rozliczeniowa","product":"SzafirHost","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.2.1","versionType":"semver"}]}],"references":[{"url":"https://cert.pl/posts/2026/05/CVE-2026-44088","tags":["third-party-advisory"]},{"url":"https://www.elektronicznypodpis.pl/","tags":["product"]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.6,"baseSeverity":"HIGH","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"LOW","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"ACTIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-434","description":"CWE-434 Unrestricted Upload of File with Dangerous Type","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"CERT-PL","orgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateUpdated":"2026-05-15T08:48:11.694Z"},"credits":[{"lang":"en","type":"finder","value":"Mariusz Maik"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-15T11:07:43.075751Z","id":"CVE-2026-44088","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-15T11:07:58.948Z"}}]}}}