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CVE-2026-55825— Contao: Possible path traversal in job download URIs

Quick assessment

Affected
contao contao
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Contao是Contao组织开源的一套采用PHP开发的开源内容管理系统(CMS)。该系统支持搜索引擎、权限管理和CSS框架等。 Contao 5.7.0至5.7.6版本存在路径遍历漏洞，该漏洞源于对附件标识符的路径验证不当，可能导致经过身份验证的后端用户通过路径遍历读取其他作业目录中的文件，造成跨作业授权绕过。

CVSS 3.1 · Low EPSS 0.30% · P20

Affected Version Matrix 1

VendorProduct Version RangeStatus
contao contao >= 5.7.0, < 5.7.7 affected
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I. Basic Information for CVE-2026-55825

Vulnerability Information
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Vulnerability Title
Contao: Possible path traversal in job download URIs
Source: CVE Program / CVE List V5
Vulnerability Description
Contao is an Open Source CMS. In versions 5.7.0 through 5.7.6, an authenticated backend user who can access one job can request an attachment identifier containing ../ segments and make the job attachment download endpoint read a file from another job directory inside var/job-attachments. The controller authorizes only the jobUuid route parameter. The later attachment lookup joins that authorized job UUID with the attacker-controlled identifier, then passes the combined path to the virtual filesystem. VirtualFilesystem::resolve() canonicalizes the whole path and only rejects paths that escape the filesystem mount, so authorized-job/../victim-job/debug_log.csv becomes victim-job/debug_log.csv. This is a cross-job authorization bypass for known job attachment paths. It is not a practical brute-force against unknown jobs because job directories are UUID v4 values.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
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
Contao 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Contao是Contao组织开源的一套采用PHP开发的开源内容管理系统(CMS)。该系统支持搜索引擎、权限管理和CSS框架等。 Contao 5.7.0至5.7.6版本存在路径遍历漏洞，该漏洞源于对附件标识符的路径验证不当，可能导致经过身份验证的后端用户通过路径遍历读取其他作业目录中的文件，造成跨作业授权绕过。
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
contao contao >= 5.7.0, < 5.7.7 -

II. Public POCs for CVE-2026-55825

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III. Intelligence Information for CVE-2026-55825

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Vendor Advisories for CVE-2026-55825 (1)

Same Patch Batch · contao · 2026-07-31 · 3 CVEs total

CVE-2026-57232 3.1 LOW Contao: Server-Side Request Forgery (SSRF) via Unvalidated RSS Feed URL in Feed Reader Mod
CVE-2026-55824 2.6 LOW Contao crawler leaks auth credentials to external hosts

IV. Related Vulnerabilities

Same product: contao
Same vendor: contao
Same weakness: CWE-22

V. Comments for CVE-2026-55825

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