{"id":"CVE-2026-41412","state":"PUBLISHED","title":"alf.io vulnerable to Arbitrary File Read and Exfil via simpleHttpClient Extension Script","description":"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.","publishedAt":"2026-06-02T22:51:36.358Z","updatedAt":"2026-06-03T14:02:05.598Z","severity":{"score":4.9,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["alfio-event alf.io"],"affected":[{"vendor":"alfio-event","product":"alf.io","versions":[{"version":"< 2.0-M5-2606","status":"affected"}]}],"references":["https://github.com/alfio-event/alf.io/security/advisories/GHSA-6m62-53cw-4373"],"weaknesses":["CWE-22","CWE-73"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/41xxx/CVE-2026-41412.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-41412","state":"PUBLISHED","datePublished":"2026-06-02T22:51:36.358Z","dateUpdated":"2026-06-03T14:02:05.598Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-04-20T15:32:33.812Z"},"containers":{"cna":{"title":"alf.io vulnerable to Arbitrary File Read and Exfil via simpleHttpClient Extension Script","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"alfio-event","product":"alf.io","versions":[{"version":"< 2.0-M5-2606","status":"affected"}]}],"references":[{"url":"https://github.com/alfio-event/alf.io/security/advisories/GHSA-6m62-53cw-4373","name":"https://github.com/alfio-event/alf.io/security/advisories/GHSA-6m62-53cw-4373","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.9,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-22","lang":"en","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-73","lang":"en","description":"CWE-73: External Control of File Name or Path","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-02T22:51:36.358Z"},"source":{"advisory":"GHSA-6m62-53cw-4373","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/alfio-event/alf.io/security/advisories/GHSA-6m62-53cw-4373","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-03T14:01:59.867408Z","id":"CVE-2026-41412","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-03T14:02:05.598Z"}}]}}}