# CVE-2026-59203: pillow: Pillow is a Python imaging library

CVE-2026-59203 is fixed in 3 products on 1 platform, first by python3-pil 12.1.1-2ubuntu1.4, released July 14, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-59203
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0040
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 14, 2026

## Description

Pillow is a Python imaging library. From 12.0.0 through 12.2.0, Pillow's EPS parser in PIL/EpsImagePlugin.py accepts a negative byte count in the %%BeginBinary directive, allowing a crafted EPS file to cause Image.open() to seek backwards to the same directive and parse it repeatedly in an infinite loop. This issue is fixed in version 12.3.0.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | pillow Debian 14 | 12.3.0-1 | [DEBIAN-CVE-2026-59203](https://patchblox.com/security/data/fix/linux/debian-cve-2026-59203.md) | Jul 25, 2026 |
| Linux | python3-pil Ubuntu 26.04.1 LTS (resolute) | 12.1.1-2ubuntu1.4 | [python3-pil 12.1.1-2ubuntu1.4](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-python3-pil-12.1.1-2ubuntu1.4.md) | Jul 14, 2026 |
| Linux | python3-pil.imagetk Ubuntu 26.04.1 LTS (resolute) | 12.1.1-2ubuntu1.4 | [python3-pil.imagetk 12.1.1-2ubuntu1.4](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-python3-pil.imagetk-12.1.1-2ubuntu1.4.md) | Jul 14, 2026 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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