Critical Vulnerability in cpp-httplib: CVE-2025-66570 Exposes Security Risks

cpp-httplib Updated 22 Oct 2026

Summary

30/11/-0001
N/A
No i
Unrated
Not published

DEBIAN-CVE-2025-66570: ... Affects cpp-httplib versions 0.11.4+ds-1 – 0.26.0+ds-2. No fix is published. How to fix ↓

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Background

cpp-httplib is a lightweight C++ HTTP/HTTPS server and client library designed for ease of use and high performance. It is widely utilized in various applications for handling HTTP requests and responses efficiently. However, the library is currently vulnerable to CVE-2025-66570, which could potentially expose applications to security threats if not addressed promptly.

Vulnerability Detail

CVE-2025-66570 is a critical vulnerability that affects all versions of cpp-httplib. The issue arises from improper handling of certain HTTP requests, which could allow an attacker to exploit the vulnerability to execute arbitrary code or cause denial of service. The vulnerability's origin is linked to insufficient input validation, making it essential for developers to understand its implications and take corrective measures.

How To Fix

No fixed version is published for this vulnerability.

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Workaround

As a temporary workaround, developers can implement input validation checks in their application code to mitigate the risk of exploitation until a patched version of cpp-httplib is released. This can include sanitizing user inputs and restricting the types of requests that the server will process.

Conclusion

The CVE-2025-66570 vulnerability in cpp-httplib poses significant security risks that must be addressed promptly. Users are encouraged to update their libraries and implement workarounds to mitigate potential threats. Utilizing tools like Vulert can enhance your ability to monitor and manage vulnerabilities effectively.

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FAQ

CVE-2025-66570 is a critical vulnerability in the cpp-httplib library that can lead to arbitrary code execution or denial of service.

You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software by checking your manifest file like package-lock.json.

Implement input validation and request restrictions as a temporary workaround until you can update to a patched version.

Detailed information about CVE-2025-66570 can be found in the official vulnerability database and security advisories.

Vulert uses a manifest file to monitor open-source vulnerabilities in real-time, providing alerts without requiring access to the code or installation.

Related vulnerabilities

Recent vulnerabilities recorded for cpp-httplib.

How To Fix

No fixed version is published for this vulnerability.

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