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

Quick assessment

Affected
symfony ux
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Symfony ux是Symfony组织开源的一个Symfony的JavaScript生态系统。 Symfony UX 2.32.0版本至2.36.1之前版本和3.0.0版本至3.2.0之前版本存在路径遍历漏洞，该漏洞源于ux:install控制台命令复制路径未进行充分验证，可能导致攻击者写入任意位置或读取本地文件。

CVSS 7.8 · High EPSS 0.19% · P8

Affected Version Matrix 2

VendorProduct Version RangeStatus
symfony ux >= 2.32.0, < 2.36.1 affected
>= 3.0.0, < 3.2.0 affected
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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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Symfony UX 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Symfony ux是Symfony组织开源的一个Symfony的JavaScript生态系统。 Symfony UX 2.32.0版本至2.36.1之前版本和3.0.0版本至3.2.0之前版本存在路径遍历漏洞，该漏洞源于ux:install控制台命令复制路径未进行充分验证，可能导致攻击者写入任意位置或读取本地文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
symfony ux >= 2.32.0, < 2.36.1 -

II. Public POCs for CVE-2026-55878

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
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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