{"id":"CVE-2026-55878","aliases":["GHSA-p9xj-fpr2-jf2q"],"url":"https://o3.security/vulnerability/CVE-2026-55878","summary":"Symfony: Path Traversal in symfony/ux-toolkit Allows Arbitrary File Write and Read via Crafted Recipe Manifest","details":"Symfony UX is a JavaScript ecosystem for Symfony. From 2.32.0 before 2.36.1 and from 3.0.0 before 3.2.0, the ux:install console command installs files from a recipe kit by copying paths listed in a copy-files map, and because Path::isRelative() accepts paths like ../../../etc, a crafted or compromised kit can write attacker-controlled content to arbitrary locations or read local files outside the recipe directory. This issue is fixed in versions 2.36.1 and 3.2.0.","published":"2026-07-08T21:30:33.816Z","modified":"2026-08-12T03:51:48.918978663Z","cvss":{"score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"epss":{"score":0.00146,"percentile":0.04407,"asOf":"2026-08-21"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"symfony/ux-toolkit","fixedVersion":"2.36.1"},{"ecosystem":"Packagist","name":"symfony/ux-toolkit","fixedVersion":"3.2.0"}],"fix":{"url":"https://github.com/symfony/ux/commit/7b4ddf3764bf269a1b5fde5bf03c4bce568694e4","label":"symfony/ux@7b4ddf3"},"references":[{"type":"WEB","url":"https://github.com/symfony/ux/releases/tag/v2.36.1"},{"type":"WEB","url":"https://github.com/symfony/ux/releases/tag/v3.2.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55878.json"},{"type":"ADVISORY","url":"https://github.com/symfony/ux/security/advisories/GHSA-p9xj-fpr2-jf2q"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55878"},{"type":"FIX","url":"https://github.com/symfony/ux/commit/7b4ddf3764bf269a1b5fde5bf03c4bce568694e4"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:48.918978663Z"}}