Path Traversal in Symfony Ux
CVE-2026-55878
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::isRelat…
Vulnerability class: Path Traversal (Directory Traversal)
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Symfony Ux — versions >= 2.32.0, < 2.36.1, >= 3.0.0, < 3.2.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-55878?
- CVE-2026-55878 is a high-severity vulnerability in Symfony Ux, classified under Path Traversal. CVSS score: 7.8/10. Published 2026-07-08.
- How severe is CVE-2026-55878?
- High severity. CVSS v3 base score is 7.8 out of 10.