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Vulnerability · Published Jul 8, 2026 · Assigned by GitHub_M

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

High 7.8

In plain English

A high-severity path traversal in ux from symfony. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 91.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Packagistsymfony/ux-toolkit2.36.1GHSA-p9xj-fpr2-jf2q
Packagistsymfony/ux-toolkit3.2.0GHSA-p9xj-fpr2-jf2q

Affected products (as reported)

VendorProductVersions
symfony ux >= 2.32.0, < 2.36.1>= 3.0.0, < 3.2.0

Weakness: CWE-22 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References