CVE-2026-55798
MEDIUM
4.5
CVSS 3.1
Description
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.
Metadata
Severity & Metrics
4.5
MEDIUM CVSS 3.1
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
Affected products (1)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| python-pillow | Pillow | — | < 12.3.0 |
Weakness (CWE)
| CWE | Source | Description |
|---|---|---|
| CWE-78 | cna | CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') |
CVSS scores (1)
| Score | Severity | Version | Source | Vector |
|---|---|---|---|---|
| 4.5 | MEDIUM | 3.1 | cna | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L |
References (5)
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-4x4j-2g7c-83w6 https://github.com/python-pillow/Pillow/security/advisories/GHSA-4x4j-2g7c-83w6
- https://github.com/python-pillow/Pillow/commit/8404ea5fe5df40fc34aa1e51403dd6fce0778b8a https://github.com/python-pillow/Pillow/commit/8404ea5fe5df40fc34aa1e51403dd6fce0778b8a
- https://github.com/python-pillow/Pillow/commit/88194166691b7b603529b8b036ab3ab9cedd2de4 https://github.com/python-pillow/Pillow/commit/88194166691b7b603529b8b036ab3ab9cedd2de4
- https://github.com/python-pillow/Pillow/commit/b0e06caa64c1405aa3da0bb1d2bd9a77ca22de7f https://github.com/python-pillow/Pillow/commit/b0e06caa64c1405aa3da0bb1d2bd9a77ca22de7f
- https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rst https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rst