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VulnerabilityPublished Updated

CVE-2026-9494: Canonical ubuntu-pro-client (formerly · Information Disclosure Vulnerability Exists

Affects ubuntu-advantage-toolsSource GCVE Database

0
Authoritative record:CVE-2026-9494· Medium 5.5

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

CVSS 3.1 base score
5.5Medium
How severe the flaw is on the 0–10 CVSS scale.
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:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 16 Jul 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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).

Affected software

ProductAffectedFixed in
Ubuntu 26.04 LTSubuntu-advantage-toolspkg:deb/ubuntu/ubuntu-advantage-tools?arch=source&distro=resoluteOther threatsAffected
  • <37.2ubuntu0.1
  • =37ubuntu0
Fixed in
  • 37.2ubuntu0.1
Ubuntu 25.10ubuntu-advantage-toolspkg:deb/ubuntu/ubuntu-advantage-tools?arch=source&distro=questingOther threatsAffected
  • 35 – 37ubuntu0
6 affected builds
Fixed in–
Ubuntu 24.04 LTSubuntu-advantage-toolspkg:deb/ubuntu/ubuntu-advantage-tools?arch=source&distro=nobleOther threatsAffected
  • <37.2ubuntu~24.04.1
Fixed in
  • 37.2ubuntu~24.04.1
Ubuntu 22.04 LTSubuntu-advantage-toolspkg:deb/ubuntu/ubuntu-advantage-tools?arch=source&distro=jammyOther threatsAffected
  • <37.2ubuntu~22.04.1
Fixed in
  • 37.2ubuntu~22.04.1

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.

References

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