What’s Vulnerable › Vulnerabilities

CVE-2026-55878: Symfony: Path Traversal in symfony/ux-toolkit Allows Arbitrary File Write and Read via Crafted Recipe Manifest

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-08 · updated 2026-10-25
• Weakness: CWE-22

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.

Affected products

• symfony ux: from 2.32.0, < 2.36.1; from 3.0.0, < 3.2.0

References

• https://github.com/symfony/ux/commit/7b4ddf3764bf269a1b5fde5bf03c4bce568694e4
• https://github.com/symfony/ux/releases/tag/v2.36.1
• https://github.com/symfony/ux/releases/tag/v3.2.0
• https://github.com/symfony/ux/security/advisories/GHSA-p9xj-fpr2-jf2q

Get alerted when CVE-2026-55878 or the next vulnerability affects your stack