# CVE-2026-9494: ubuntu-advantage-pro: An information disclosure vulnerability exists in Canonical ubuntu-pro-client (formerly ubuntu-advantage-tools)

CVE-2026-9494 is fixed in 5 products on 1 platform, first by ubuntu-advantage-pro 37.2ubuntu0.1, released July 17, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-9494
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0015
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 17, 2026

## Description

An information disclosure vulnerability exists in Canonical ubuntu-pro-client (formerly ubuntu-advantage-tools). The client validates Ubuntu Pro APT credentials by executing /usr/lib/apt/apt-helper using the download-file command. During this process, the secret bearer token is embedded directly in the cleartext URL component passed via the command-line arguments (argv), resulting in a URL format such as https://bearer:<token>@esm.ubuntu.com/.../. On systems utilizing a default-mounted /proc file system where process-hiding mitigations (such as hidepid) are disabled, an unprivileged local attacker can monitor system processes and read the sensitive bearer token directly from /proc/cmdline while the helper process is actively running. This leaked token can subsequently be used to gain unauthorized access to the victim's Ubuntu Pro or Expanded Security Maintenance (ESM) repositories.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | ubuntu-advantage-pro Ubuntu 22.04.1 LTS (jammy) | 37.2ubuntu~22.04.1 | [ubuntu-advantage-pro 37.2ubuntu~22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-ubuntu-advantage-pro-37.2ubuntu-22.04.1.md) | Jul 18, 2026 |
| Linux | ubuntu-advantage-pro Ubuntu 24.04.5 LTS (noble) | 37.2ubuntu~24.04.1 | [ubuntu-advantage-pro 37.2ubuntu~24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-ubuntu-advantage-pro-37.2ubuntu-24.04.1.md) | Jul 18, 2026 |
| Linux | ubuntu-advantage-pro Ubuntu 26.04.1 LTS (resolute) | 37.2ubuntu0.1 | [ubuntu-advantage-pro 37.2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-ubuntu-advantage-pro-37.2ubuntu0.1.md) | Jul 17, 2026 |
| Linux | ubuntu-advantage-tools Ubuntu 22.04.1 LTS (jammy) | 37.2ubuntu~22.04.1 | [ubuntu-advantage-tools 37.2ubuntu~22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-ubuntu-advantage-tools-37.2ubuntu-22.04.1.md) | Jul 18, 2026 |
| Linux | ubuntu-advantage-tools Ubuntu 24.04.5 LTS (noble) | 37.2ubuntu~24.04.1 | [ubuntu-advantage-tools 37.2ubuntu~24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-ubuntu-advantage-tools-37.2ubuntu-24.04.1.md) | Jul 18, 2026 |
| Linux | ubuntu-advantage-tools Ubuntu 26.04.1 LTS (resolute) | 37.2ubuntu0.1 | [ubuntu-advantage-tools 37.2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-ubuntu-advantage-tools-37.2ubuntu0.1.md) | Jul 17, 2026 |
| Linux | ubuntu-pro-auto-attach Ubuntu 22.04.1 LTS (jammy) | 37.2ubuntu~22.04.1 | [ubuntu-pro-auto-attach 37.2ubuntu~22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-ubuntu-pro-auto-attach-37.2ubuntu-22.04.1.md) | Jul 18, 2026 |
| Linux | ubuntu-pro-auto-attach Ubuntu 24.04.5 LTS (noble) | 37.2ubuntu~24.04.1 | [ubuntu-pro-auto-attach 37.2ubuntu~24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-ubuntu-pro-auto-attach-37.2ubuntu-24.04.1.md) | Jul 18, 2026 |
| Linux | ubuntu-pro-auto-attach Ubuntu 26.04.1 LTS (resolute) | 37.2ubuntu0.1 | [ubuntu-pro-auto-attach 37.2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-ubuntu-pro-auto-attach-37.2ubuntu0.1.md) | Jul 17, 2026 |
| Linux | ubuntu-pro-client Ubuntu 22.04.1 LTS (jammy) | 37.2ubuntu~22.04.1 | [ubuntu-pro-client 37.2ubuntu~22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-ubuntu-pro-client-37.2ubuntu-22.04.1.md) | Jul 18, 2026 |
| Linux | ubuntu-pro-client Ubuntu 24.04.5 LTS (noble) | 37.2ubuntu~24.04.1 | [ubuntu-pro-client 37.2ubuntu~24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-ubuntu-pro-client-37.2ubuntu-24.04.1.md) | Jul 18, 2026 |
| Linux | ubuntu-pro-client Ubuntu 26.04.1 LTS (resolute) | 37.2ubuntu0.1 | [ubuntu-pro-client 37.2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-ubuntu-pro-client-37.2ubuntu0.1.md) | Jul 17, 2026 |
| Linux | ubuntu-pro-client-l10n Ubuntu 22.04.1 LTS (jammy) | 37.2ubuntu~22.04.1 | [ubuntu-pro-client-l10n 37.2ubuntu~22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-ubuntu-pro-client-l10n-37.2ubuntu-22.04.1.md) | Jul 18, 2026 |
| Linux | ubuntu-pro-client-l10n Ubuntu 24.04.5 LTS (noble) | 37.2ubuntu~24.04.1 | [ubuntu-pro-client-l10n 37.2ubuntu~24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-ubuntu-pro-client-l10n-37.2ubuntu-24.04.1.md) | Jul 18, 2026 |
| Linux | ubuntu-pro-client-l10n Ubuntu 26.04.1 LTS (resolute) | 37.2ubuntu0.1 | [ubuntu-pro-client-l10n 37.2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-ubuntu-pro-client-l10n-37.2ubuntu0.1.md) | Jul 17, 2026 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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