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[USN-8378-1] libwww-perl vulnerability

Posted on 03 June 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8378-1
June 03, 2026

libwww-perl 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:

libwww-perl could be made to expose sensitive information over the network.

Software Description:
- libwww-perl: simple and consistent interface to the world-wide web

Details:

It was discovered that libwww-perl incorrectly handled redirects. A remote
attacker could possibly use this issue to obtain sensitive information by
causing Authorization headers to be sent to a different host.

Update instructions:

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

Ubuntu 26.04 LTS
libwww-perl 6.81-1ubuntu0.1

Ubuntu 25.10
libwww-perl 6.78-1ubuntu0.1

Ubuntu 24.04 LTS
libwww-perl 6.76-1ubuntu0.1

Ubuntu 22.04 LTS
libwww-perl 6.61-1ubuntu0.1

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

References:
https://ubuntu.com/security/notices/USN-8378-1
CVE-2026-8368

Package Information:
https://launchpad.net/ubuntu/+source/libwww-perl/6.81-1ubuntu0.1
https://launchpad.net/ubuntu/+source/libwww-perl/6.78-1ubuntu0.1
https://launchpad.net/ubuntu/+source/libwww-perl/6.76-1ubuntu0.1
https://launchpad.net/ubuntu/+source/libwww-perl/6.61-1ubuntu0.1

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