{"id":"CVE-2026-44837","summary":"view_component: System Test Entry Point Path Check Allows Sibling Directory Escape","details":"view_component is a framework for building reusable, testable, and encapsulated view components in Ruby on Rails. From 3.0.0 to 4.9.0, the system test entrypoint canonicalizes a user-controlled file path with File.realpath, then checks whether the resolved path starts with the temp directory path. This is not a safe containment check because sibling directories can share the same string prefix. This vulnerability is fixed in 4.9.0.","aliases":["GHSA-hg3h-g7xc-f7vp"],"modified":"2026-06-18T03:54:34.369208734Z","published":"2026-05-26T19:40:47.661Z","related":["CGA-h2vg-6hh3-hvrf"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44837.json","cwe_ids":["CWE-187"],"cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44837.json"},{"type":"ADVISORY","url":"https://github.com/ViewComponent/view_component/security/advisories/GHSA-hg3h-g7xc-f7vp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44837"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/viewcomponent/view_component","events":[{"introduced":"c696930250b696fb5528be08edea13a0c78b8325"},{"fixed":"458281bc49851e3090638cf6d011e84fcd49f2da"}],"database_specific":{"extracted_events":[{"introduced":"3.0.0"},{"fixed":"4.9.0"},{"introduced":"3.0.0"},{"fixed":"4.9.0"}],"source":["AFFECTED_FIELD","CPE_RANGE"],"cpe":"cpe:2.3:a:viewcomponent:view_component:*:*:*:*:*:ruby:*:*"}}],"versions":["v4.8.0","v4.7.0","v4.6.0","v4.5.0","v4.4.0","v4.3.0","v4.2.0","v4.1.1","v3.23.2","v4.1.0","v4.0.2","v4.0.1","v4.0.0","v4.0.0.rc5","v4.0.0.rc4","v4.0.0.rc3","v4.0.0.rc2","v4.0.0.rc1","4.0.0.rc1","v3.23.1","v3.23.0","v3.22.0","v3.21.0","v3.20.0","v3.19.0","v3.18.0","v3.17.0","v3.16.0","v3.15.1","v3.15.0","v3.14.0","v3.13.0","v3.12.1","v3.12.0","v3.11.0","v3.10.0","v3.9.0","v3.8.0","v3.7.0","v3.6.0","v3.5.0","v3.3.0","v3.2.0","v3.1.0","v3.0.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-44837.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}