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[USN-7962-1] cpp-httplib vulnerability

Posted on 15 January 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-7962-1
January 14, 2026

cpp-httplib vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.10
- Ubuntu 25.04
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

cpp-httplib could allow unintended access to network services if it
received specially crafted network traffic.

Software Description:
- cpp-httplib: A C++11 single-file header-only cross platform HTTP/HTTPS library.

Details:

It was discovered that cpp-httplib did not correctly handle HTTP headers.
A remote attacker could possibly use this issue to bypass authorization
and impersonate users.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 25.10
libcpp-httplib-dev 0.18.7-1ubuntu0.25.10.1
libcpp-httplib0.18 0.18.7-1ubuntu0.25.10.1

Ubuntu 25.04
libcpp-httplib-dev 0.18.7-1ubuntu0.25.04.1
libcpp-httplib0.18 0.18.7-1ubuntu0.25.04.1

Ubuntu 24.04 LTS
libcpp-httplib-dev 0.14.3+ds-1.1ubuntu0.1~esm1
Available with Ubuntu Pro
libcpp-httplib0.14t64 0.14.3+ds-1.1ubuntu0.1~esm1
Available with Ubuntu Pro

Ubuntu 22.04 LTS
libcpp-httplib-dev 0.10.3+ds-1ubuntu0.1~esm1
Available with Ubuntu Pro
libcpp-httplib0 0.10.3+ds-1ubuntu0.1~esm1
Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-7962-1
CVE-2025-66570

Package Information:
https://launchpad.net/ubuntu/+source/cpp-httplib/0.18.7-1ubuntu0.25.10.1
https://launchpad.net/ubuntu/+source/cpp-httplib/0.18.7-1ubuntu0.25.04.1

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