{"id":"CVE-2026-41412","summary":"alf.io vulnerable to Arbitrary File Read and Exfil via simpleHttpClient Extension Script","details":"alf.io is an open source ticket reservation system for conferences, trade shows, workshops, and meetups. Prior to version 2.0-M5-2606, the alf.io extension sandbox injects a fully-functional HTTP client (`simpleHttpClient`) into every extension script's scope. The `postFileAndSaveResponse()` method accepts an arbitrary filesystem path as its `file` parameter and reads the file contents using `new FileInputStream(file)` with no path validation, directory restriction, or allowlist. A malicious extension script can read any file accessible to the JVM process user and exfiltrate it to an attacker-controlled server via HTTP POST. Version 2.0-M5-2606 patches the issue.","aliases":["GHSA-6m62-53cw-4373"],"modified":"2026-08-12T03:51:21.470906339Z","published":"2026-06-02T22:51:36.358Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41412.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-22","CWE-73"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41412.json"},{"type":"ADVISORY","url":"https://github.com/alfio-event/alf.io/security/advisories/GHSA-6m62-53cw-4373"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41412"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/alfio-event/alf.io","events":[{"introduced":"0"},{"fixed":"2b4759f9136cf5c6f5cb7784c30c9a09da217151"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"fixed":"2.0-M5-2606"}]}}],"versions":["2.0-M5-2509","2.0-M5-2502","2.0-M5","2.0-M4-2304","2.0-M4-2301","2.0-M4-2204","2.0-M4","2.0-M4.RC4","2.0-M4.RC3","2.0-M4.RC2","2.0-M4.RC1","2.0-M3","2.0-M2","2.0-M1-1906","2.0-M1-1906.1","2.0-M1","2.0-M0","1.14.1","1.14","1.14-RC2","1.14-RC1","1.13","1.13-RC3","1.13-RC2","1.13-RC1","1.12","1.12-RC4","1.12-RC3","1.12-RC2","1.12-RC1","1.11","1.10.1","1.10","1.10-RC2","1.10-RC1","1.9.1","1.9","1.8","1.8-RC2","1.8-RC1","1.7","1.6","1.5","1.4.1","1.4","1.4-RC2","alfio-1.3.1","alfio-1.3","alfio-1.3-beta1","alfio-1.2","alfio-1.1","v1.0-pre-rename-v2","v1.0-pre-rename"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-41412.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N"}]}