{"id":"CVE-2026-44088","aliases":["EUVD-2026-30512","GHSA-j8f8-frc5-vgc6"],"status":"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.","severity":{"version":"4.0","score":8.6,"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00445,"percentile":0.39102,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-434"],"published":"2026-05-15T08:48:11Z","modified":"2026-10-26T14:10:00Z","products":[{"vendor":"krajowa izba rozliczeniowa","product":"szafirhost"}],"references":[{"url":"https://cert.pl/posts/2026/05/CVE-2026-44088","tags":["third-party-advisory"]},{"url":"https://www.elektronicznypodpis.pl/","tags":["product"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44088"},{"url":"https://www.elektronicznypodpis.pl"},{"url":"https://github.com/advisories/GHSA-j8f8-frc5-vgc6"}],"sources":{"cve":[{"id":"CVE-2026-44088","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.","status":"published","published":"2026-05-15T08:48:11.694Z","modified":"2026-05-15T11:07:58.948Z","cvss":[{"version":"4.0","score":8.6,"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","level":"high","assessor":"cna"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T13:43:00.288193Z"}],"euvd":[{"id":"EUVD-2026-30512","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.","status":"published","published":"2026-05-15T08:48:11Z","modified":"2026-05-15T11:07:58Z","cvss":[{"version":"4.0","score":8.6,"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","level":"high"}],"updated_at":"2026-11-02T19:04:30.03108Z"}],"ghsa":[{"id":"GHSA-j8f8-frc5-vgc6","title":"SzafirHost verifies the signature of the downloaded JAR file using class JarInputStream (reading...","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.","status":"published","published":"2026-05-15T09:31:32Z","modified":"2026-05-15T09:31:42Z","cvss":[{"version":"4.0","score":8.6,"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/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","level":"high"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T15:08:10.185094Z"}],"nvd":[{"id":"CVE-2026-44088","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.","status":"published","published":"2026-05-15T09:16:16.307Z","modified":"2026-10-26T14:10:00.13Z","cvss":[{"version":"4.0","score":8.6,"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/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","level":"high","assessor":"secondary"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:12:19.39893Z"}]}}