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[USN-8854-1] OpenStack Keystone vulnerabilities

Posted on 30 September 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8854-1
September 30, 2026

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

- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in OpenStack Keystone.

Software Description:
- keystone: OpenStack identity service

Details:

Grzegorz Grasza discovered that OpenStack Keystone did not consistently
enforce restrictions for delegated authentication tokens. An authenticated
attacker could possibly use this issue to create credentials or delegations
that outlasted the delegated token. (CVE-2026-80182)

It was discovered that OpenStack Keystone incorrectly handled role
assignment queries under certain circumstances. An authenticated attacker
could possibly use this issue to obtain sensitive information. This
issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04
LTS, and Ubuntu 26.04 LTS. (CVE-2026-80183)

Tim Shephard discovered that OpenStack Keystone did not properly
restrict reauthentication using delegated tokens. An authenticated
attacker could possibly use this issue to escape their intended
project scope and obtain unauthorized access. (CVE-2026-80184)

Update instructions:

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

Ubuntu 26.04 LTS
keystone 2:29.0.0-0ubuntu1.4

Ubuntu 24.04 LTS
keystone 2:25.0.0-0ubuntu1.6

Ubuntu 22.04 LTS
keystone 2:21.0.1-0ubuntu2.6

Ubuntu 20.04 LTS
keystone 2:17.0.1-0ubuntu2+esm2
Available with Ubuntu Pro

Ubuntu 18.04 LTS
keystone 2:13.0.4-0ubuntu1+esm1
Available with Ubuntu Pro

Ubuntu 16.04 LTS
keystone 2:9.3.0-0ubuntu3.2+esm2
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-8854-1
CVE-2026-80182, CVE-2026-80183, CVE-2026-80184

Package Information:
https://launchpad.net/ubuntu/+source/keystone/2:29.0.0-0ubuntu1.4
https://launchpad.net/ubuntu/+source/keystone/2:25.0.0-0ubuntu1.6
https://launchpad.net/ubuntu/+source/keystone/2:21.0.1-0ubuntu2.6

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