USN-8957-1: authd vulnerability

Publication date

27 October 2026

Overview

authd could allow unauthorized access to another user's files under certain circumstances.

Releases


Packages

  • authd - Authentication daemon for cloud-based identity provider

Details

Ali Mashally discovered that authd did not properly validate user
identities when matching accounts from identity providers. An attacker
could possibly use this issue to gain access to another user's local
account and files, resulting in unauthorized access to sensitive
information.

Ali Mashally discovered that authd did not properly validate user
identities when matching accounts from identity providers. An attacker
could possibly use this issue to gain access to another user's local
account and files, resulting in unauthorized access to sensitive
information.

Update instructions

After a standard system update you need to restart authd to make all the necessary changes.

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
26.10 stonking authd –  0.7.1

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Have additional questions?

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