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CVE-2026-53596— FreeScout has unrestricted file upload without rate limiting that leads to resource exhaustion (DoS)

Quick assessment

Affected
freescout-help-desk freescout
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.

FreeScout是FreeScout公司开源的一个使用 PHP(Laravel 框架)构建的超轻量级且功能强大的免费开源帮助台和共享收件箱。 FreeScout 1.8.224之前版本存在资源管理错误漏洞，该漏洞源于未对文件上传端点实施速率限制，可能导致任何用户通过大量上传请求淹没服务器，从而导致数据库过载和潜在的拒绝服务。

CVSS 5.3 · Medium EPSS 0.29% · P21

Affected Version Matrix 1

VendorProduct Version RangeStatus
freescout-help-desk freescout < 1.8.224 affected
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I. Basic Information for CVE-2026-53596

Vulnerability Information
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Vulnerability Title
FreeScout has unrestricted file upload without rate limiting that leads to resource exhaustion (DoS)
Source: CVE Program / CVE List V5
Vulnerability Description
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.224, the FreeScout helpdesk application does not enforce rate limiting on the file upload endpoint. Any user can flood the server with upload requests, leading to database overload and potential denial of service for all users. Version 1.8.224 contains a fix.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
FreeScout 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreeScout是FreeScout公司开源的一个使用 PHP(Laravel 框架)构建的超轻量级且功能强大的免费开源帮助台和共享收件箱。 FreeScout 1.8.224之前版本存在资源管理错误漏洞，该漏洞源于未对文件上传端点实施速率限制，可能导致任何用户通过大量上传请求淹没服务器，从而导致数据库过载和潜在的拒绝服务。
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
freescout-help-desk freescout < 1.8.224 -

II. Public POCs for CVE-2026-53596

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III. Intelligence Information for CVE-2026-53596

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Vendor Advisories for CVE-2026-53596 (1)

Same Patch Batch · freescout-help-desk · 2026-07-20 · 8 CVEs total

CVE-2026-53595 9.4 CRITICAL FreeScout vulnerable to anonymous account takeover via /user-setup empty invite_hash on My
CVE-2026-53593 8.8 HIGH FreeScout Vulnerable to Authenticated Remote Code Execution via incomplete upload extensio
CVE-2026-53591 8.6 HIGH FreeScout Vulnerable to Unauthenticated Conversation Thread Injection via HMAC Length Bypa
CVE-2026-48812 7.5 HIGH FreeScout Allows Unauthenticated Access to Legacy Attachment Files
CVE-2026-45295 6.5 MEDIUM FreeScout Vulnerable to Unauthenticated Thread Read-Status Manipulation and Conversation E
CVE-2026-53594 4.9 MEDIUM FreeScout has Arbitrary File Read in App Logs Viewer via Forged Encrypted Path
CVE-2026-53592 4.6 MEDIUM FreeScout vulnerable to prototype pollution in getQueryParam

IV. Related Vulnerabilities

Same product: freescout
Same vendor: freescout-help-desk
Same weakness: CWE-400