UBUNTU-CVE-2026-55798

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2026-55798
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55798.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-55798
Upstream
Published
2026-07-06T19:17:00Z
Modified
2026-07-09T17:15:27.003114835Z
Severity
  • 4.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Pillow is a Python imaging library. Prior to 12.3.0, WindowsViewer.get_command() constructed a cmd.exe shell command by directly embedding a file path into an f-string without escaping and passed the result to subprocess.Popen(..., shell=True), allowing shell metacharacters in the file path to inject arbitrary cmd.exe commands. This issue is fixed in version 12.3.0.

References

Affected packages

Ubuntu:20.04:LTS
pillow

Package

Name
pillow
Purl
pkg:deb/ubuntu/pillow?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

6.*
6.1.0-1
6.1.0-1build1
6.2.1-2
7.*
7.0.0-4
7.0.0-4build1
7.0.0-4ubuntu0.1
7.0.0-4ubuntu0.2
7.0.0-4ubuntu0.3
7.0.0-4ubuntu0.4
7.0.0-4ubuntu0.5
7.0.0-4ubuntu0.6
7.0.0-4ubuntu0.7
7.0.0-4ubuntu0.8
7.0.0-4ubuntu0.9

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-pil",
            "binary_version": "7.0.0-4ubuntu0.9"
        },
        {
            "binary_name": "python3-pil.imagetk",
            "binary_version": "7.0.0-4ubuntu0.9"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55798.json"
Ubuntu:22.04:LTS
pillow

Package

Name
pillow
Purl
pkg:deb/ubuntu/pillow?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

8.*
8.1.2+dfsg-0.3
9.*
9.0.0-1
9.0.1-1
9.0.1-1build1
9.0.1-1ubuntu0.1
9.0.1-1ubuntu0.2
9.0.1-1ubuntu0.3
9.0.1-1ubuntu0.4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-pil",
            "binary_version": "9.0.1-1ubuntu0.4"
        },
        {
            "binary_name": "python3-pil.imagetk",
            "binary_version": "9.0.1-1ubuntu0.4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55798.json"
Ubuntu:24.04:LTS
pillow

Package

Name
pillow
Purl
pkg:deb/ubuntu/pillow?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

10.*
10.0.0-1
10.1.0-1
10.2.0-1
10.2.0-1build1
10.2.0-1ubuntu1
10.2.0-1ubuntu1.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-pil",
            "binary_version": "10.2.0-1ubuntu1.2"
        },
        {
            "binary_name": "python3-pil.imagetk",
            "binary_version": "10.2.0-1ubuntu1.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55798.json"
Ubuntu:25.10
pillow

Package

Name
pillow
Purl
pkg:deb/ubuntu/pillow?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

11.*
11.1.0-5build1
11.3.0-1ubuntu1
11.3.0-1ubuntu1.1
11.3.0-1ubuntu1.2
11.3.0-1ubuntu1.3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-pil",
            "binary_version": "11.3.0-1ubuntu1.3"
        },
        {
            "binary_name": "python3-pil.imagetk",
            "binary_version": "11.3.0-1ubuntu1.3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55798.json"
Ubuntu:26.04:LTS
pillow

Package

Name
pillow
Purl
pkg:deb/ubuntu/pillow?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

11.*
11.3.0-1ubuntu1
11.3.0-1ubuntu2
12.*
12.0.0-1ubuntu1
12.1.1-1ubuntu1
12.1.1-2ubuntu1
12.1.1-2ubuntu1.1
12.1.1-2ubuntu1.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-pil",
            "binary_version": "12.1.1-2ubuntu1.2"
        },
        {
            "binary_name": "python3-pil.imagetk",
            "binary_version": "12.1.1-2ubuntu1.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55798.json"
Ubuntu:Pro:14.04:LTS
pillow

Package

Name
pillow
Purl
pkg:deb/ubuntu/pillow?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.2.1-1ubuntu2
2.2.1-2ubuntu1
2.2.1-3ubuntu2
2.2.1-3ubuntu3
2.2.1-3ubuntu4
2.2.1-3ubuntu6
2.3.0-1ubuntu1
2.3.0-1ubuntu2
2.3.0-1ubuntu3
2.3.0-1ubuntu3.2
2.3.0-1ubuntu3.3
2.3.0-1ubuntu3.4
2.3.0-1ubuntu3.4+esm1
2.3.0-1ubuntu3.4+esm2
2.3.0-1ubuntu3.4+esm3
2.3.0-1ubuntu3.4+esm4
2.3.0-1ubuntu3.4+esm5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python-imaging",
            "binary_version": "2.3.0-1ubuntu3.4+esm5"
        },
        {
            "binary_name": "python-imaging-compat",
            "binary_version": "2.3.0-1ubuntu3.4+esm5"
        },
        {
            "binary_name": "python-imaging-sane",
            "binary_version": "2.3.0-1ubuntu3.4+esm5"
        },
        {
            "binary_name": "python-imaging-tk",
            "binary_version": "2.3.0-1ubuntu3.4+esm5"
        },
        {
            "binary_name": "python-pil",
            "binary_version": "2.3.0-1ubuntu3.4+esm5"
        },
        {
            "binary_name": "python-pil.imagetk",
            "binary_version": "2.3.0-1ubuntu3.4+esm5"
        },
        {
            "binary_name": "python-sane",
            "binary_version": "2.3.0-1ubuntu3.4+esm5"
        },
        {
            "binary_name": "python3-imaging",
            "binary_version": "2.3.0-1ubuntu3.4+esm5"
        },
        {
            "binary_name": "python3-imaging-sane",
            "binary_version": "2.3.0-1ubuntu3.4+esm5"
        },
        {
            "binary_name": "python3-imaging-tk",
            "binary_version": "2.3.0-1ubuntu3.4+esm5"
        },
        {
            "binary_name": "python3-pil",
            "binary_version": "2.3.0-1ubuntu3.4+esm5"
        },
        {
            "binary_name": "python3-pil.imagetk",
            "binary_version": "2.3.0-1ubuntu3.4+esm5"
        },
        {
            "binary_name": "python3-sane",
            "binary_version": "2.3.0-1ubuntu3.4+esm5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55798.json"
Ubuntu:Pro:16.04:LTS
pillow

Package

Name
pillow
Purl
pkg:deb/ubuntu/pillow?arch=source&distro=esm-infra%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.9.0-1
3.*
3.0.0-1
3.0.0-1build1
3.1.0-1
3.1.1-1
3.1.2-0ubuntu1
3.1.2-0ubuntu1.1
3.1.2-0ubuntu1.3
3.1.2-0ubuntu1.4
3.1.2-0ubuntu1.5
3.1.2-0ubuntu1.6
3.1.2-0ubuntu1.6+esm1
3.1.2-0ubuntu1.6+esm2
3.1.2-0ubuntu1.6+esm3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python-imaging",
            "binary_version": "3.1.2-0ubuntu1.6+esm3"
        },
        {
            "binary_name": "python-pil",
            "binary_version": "3.1.2-0ubuntu1.6+esm3"
        },
        {
            "binary_name": "python-pil.imagetk",
            "binary_version": "3.1.2-0ubuntu1.6+esm3"
        },
        {
            "binary_name": "python3-pil",
            "binary_version": "3.1.2-0ubuntu1.6+esm3"
        },
        {
            "binary_name": "python3-pil.imagetk",
            "binary_version": "3.1.2-0ubuntu1.6+esm3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55798.json"
Ubuntu:Pro:18.04:LTS
pillow

Package

Name
pillow
Purl
pkg:deb/ubuntu/pillow?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

4.*
4.1.1-3build2
4.3.0-2ubuntu1
5.*
5.0.0-1
5.1.0-1
5.1.0-1ubuntu0.2
5.1.0-1ubuntu0.3
5.1.0-1ubuntu0.4
5.1.0-1ubuntu0.5
5.1.0-1ubuntu0.6
5.1.0-1ubuntu0.7
5.1.0-1ubuntu0.8
5.1.0-1ubuntu0.8+esm1
5.1.0-1ubuntu0.8+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python-pil",
            "binary_version": "5.1.0-1ubuntu0.8+esm2"
        },
        {
            "binary_name": "python-pil.imagetk",
            "binary_version": "5.1.0-1ubuntu0.8+esm2"
        },
        {
            "binary_name": "python3-pil",
            "binary_version": "5.1.0-1ubuntu0.8+esm2"
        },
        {
            "binary_name": "python3-pil.imagetk",
            "binary_version": "5.1.0-1ubuntu0.8+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55798.json"
Ubuntu:Pro:20.04:LTS
pillow-python2

Package

Name
pillow-python2
Purl
pkg:deb/ubuntu/pillow-python2?arch=source&distro=esm-apps%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

6.*
6.2.1-3~build1
6.2.1-3
6.2.1-3ubuntu0.1~esm1
6.2.1-3ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python-pil",
            "binary_version": "6.2.1-3ubuntu0.1~esm2"
        },
        {
            "binary_name": "python-pil.imagetk",
            "binary_version": "6.2.1-3ubuntu0.1~esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55798.json"