CVE-2026-55878
High
Description
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.
SeverityHigh
CVSS7.8
Exploit probability—
ProductSymfony/ux-toolkit
PublishedJul 8, 2026
First seenJul 8, 2026
Weakness typeCWE-22Path traversal
How to fix
Update
- symfony/ux-toolkit2.36.1, 3.2.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| symfony/ux-toolkitPackagist | 2.32.0 ≤ v < 2.36.1, 3.0.0 ≤ v < 3.2.0 | 2.36.1, 3.2.0 |
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