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Ubuntu 25.10: cpp-httplib Critical HTTP Access Attack 2025-66570

ubuntu
Calendar Grey January 15, 2026
Dist Ubuntu Esm H88
Unresolved cpp-httplib flaw could allow unauthorized access via crafted network traffic, potentially leading to impersonation attacks.
cpp-httplib could allow unintended access to network services if it received specially crafted network traffic.

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.

Topics%20covered

Topics Covered

security advisory critical Ubuntu cpp-httplib http access issue attack impersonation

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

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7962-1

Topics%20covered

Topics Covered

security advisory critical Ubuntu cpp-httplib http access issue attack impersonation

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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