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

CVSS 7.8 · High EPSS 0.15% · P4

Affected Version Matrix 2

VendorProductVersion RangeStatus
symfonyux>= 2.32.0, < 2.36.1affected
>= 3.0.0, < 3.2.0affected
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I. Basic Information for CVE-2026-55878

Vulnerability Information
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Vulnerability Title
Symfony: Path Traversal in symfony/ux-toolkit Allows Arbitrary File Write and Read via Crafted Recipe Manifest
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
symfonyux >= 2.32.0, < 2.36.1 -

II. Public POCs for CVE-2026-55878

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 8702 chars
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III. Intelligence Information for CVE-2026-55878

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Patches & Fixes for CVE-2026-55878 (1)

Vendor Advisories for CVE-2026-55878 (1)

Vendor Pages for CVE-2026-55878 (2)

IV. Related Vulnerabilities

Same product: ux
Same vendor: symfony
Same weakness: CWE-22

V. Comments for CVE-2026-55878

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