UBUNTU-CVE-2026-96643

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Source
https://ubuntu.com/security/CVE-2026-96643
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-96643.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-96643
Upstream
Downstream
Related
Published
2026-10-21T21:20:00Z
Modified
2026-11-13T11:22:56Z
Severity
  • 7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Pillow is a Python imaging library. From 11.0.0 until 13.0.0, Exif.load() in src/PIL/Image.py repeatedly slices the remaining EXIF data while it begins with the six-byte Exif header. src/PIL/PngImagePlugin.py accepts an uncapped PNG eXIf chunk, so a file filled with repeated headers causes a new shrinking copy on every iteration and quadratic CPU work. The condition is reachable through Image.getexif(), Image._getexif(), and ImageOps.exif_transpose(), including common photo-upload rotation workflows. This issue is fixed in version 13.0.0.

References

Affected packages

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
0 Unknown 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-2026-96643.json"

Ubuntu:26.10 / pillow

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
12.3.0-1ubuntu2

Affected versions

12.*
12.1.1-2ubuntu1
12.3.0-1ubuntu1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "python3-pil",
            "binary_version": "12.3.0-1ubuntu2"
        },
        {
            "binary_name": "python3-pil.imagetk",
            "binary_version": "12.3.0-1ubuntu2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-96643.json"

Ubuntu:26.04:LTS / pillow

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
12.1.1-2ubuntu1.5

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
12.1.1-2ubuntu1.3
12.1.1-2ubuntu1.4

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "python3-pil",
            "binary_version": "12.1.1-2ubuntu1.5"
        },
        {
            "binary_name": "python3-pil.imagetk",
            "binary_version": "12.1.1-2ubuntu1.5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-96643.json"