CVE-2026-9494: Canonical ubuntu-pro-client (formerly · Information Disclosure Vulnerability Exists
Affects ubuntu-advantage-toolsSource GCVE Database
Not known to be exploited · CVSS 5.5 Medium · fixed in Ubuntu package updates : update the Ubuntu ubuntu-advantage-tools package when convenient.
Data as of 26 Oct 2026, 17:16 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 37.2ubuntu~22.04.1, 37.2ubuntu~24.04.1, 37.2ubuntu0.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 16 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade the Ubuntu ubuntu-advantage-tools to 37.2ubuntu~22.04.1 (package) or 37.2ubuntu~24.04.1 (package) or 37.2ubuntu0.1 (package).
Patches and advisories
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSubuntu-advantage-toolspkg:deb/ubuntu/ubuntu-advantage-tools?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 25.10ubuntu-advantage-toolspkg:deb/ubuntu/ubuntu-advantage-tools?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSubuntu-advantage-toolspkg:deb/ubuntu/ubuntu-advantage-tools?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 22.04 LTSubuntu-advantage-toolspkg:deb/ubuntu/ubuntu-advantage-tools?arch=source&distro=jammyOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
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.