Ubuntu alert USN-8470-1 (cpp-httplib)

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[USN-8470-1] cpp-httplib vulnerability
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Thu, 25 Jun 2026 14:40:27 +0000
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<E1wclFj-0001Zy-PQ@lists.ubuntu.com>
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==========================================================================
Ubuntu Security Notice USN-8470-1
June 25, 2026

cpp-httplib vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS
- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

cpp-httplib could mishandle HTTP requests if it received specially
crafted network traffic.

Software Description:
- cpp-httplib: A C++ header-only HTTP/HTTPS server and client library

Details:

It was discovered that cpp-httplib incorrectly percent-decoded HTTP
request header values. A remote attacker could use this to inject crafted
header content possibly leading to response splitting, log injection
or proxy smuggling.

Update instructions:

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

Ubuntu 26.04 LTS
  libcpp-httplib-dev              0.26.0+ds-2ubuntu3+esm1
                                  Available with Ubuntu Pro
  libcpp-httplib0.26              0.26.0+ds-2ubuntu3+esm1
                                  Available with Ubuntu Pro

Ubuntu 25.10
  libcpp-httplib-dev              0.18.7-1ubuntu0.25.10.2
  libcpp-httplib0.18              0.18.7-1ubuntu0.25.10.2

Ubuntu 24.04 LTS
  libcpp-httplib-dev              0.14.3+ds-1.1ubuntu0.1~esm2
                                  Available with Ubuntu Pro
  libcpp-httplib0.14t64           0.14.3+ds-1.1ubuntu0.1~esm2
                                  Available with Ubuntu Pro

Ubuntu 22.04 LTS
  libcpp-httplib-dev              0.10.3+ds-1ubuntu0.1~esm2
                                  Available with Ubuntu Pro
  libcpp-httplib0                 0.10.3+ds-1ubuntu0.1~esm2
                                  Available with Ubuntu Pro

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

References:
  https://ubuntu.com/security/notices/USN-8470-1
  CVE-2026-45372

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


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