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Critical Flaw in Python’s Popular Pillow Image Library Allows Code Execution via a Crafted Image

The Hacker News
CVEVulnerabilityCritical

Overview

A serious vulnerability has been discovered in Pillow, the most popular image processing library for Python, allowing attackers to execute arbitrary operating system commands on servers. The flaw, identified as CVE-2026-112900, arises from how Pillow processes EPS (Encapsulated PostScript) images. When Pillow opens these images, it passes the file name to Ghostscript without proper validation, which can be exploited by malicious users. This issue could potentially impact any application or server that uses Pillow to handle EPS images, making it a significant risk for developers and companies relying on this library for image processing. Users are urged to take immediate action to protect their systems from potential exploitation.

Key Takeaways

  • Affected Systems: Pillow library, specifically when handling EPS images. Affects any application or server using Pillow.
  • Action Required: Developers should update to the latest version of Pillow once a patch is released.
  • Timeline: Newly disclosed

Original Article Summary

Pillow, the most widely used image library for Python, can be made to run operating system commands on a server by specifying the name of a file it is told to open. The flaw, CVE-2026-112900, is in the way Pillow handles EPS images, which it opens by passing the file's name to Ghostscript, a separate program it runs to turn the image into pixels, without checking the name first.

Impact

Pillow library, specifically when handling EPS images. Affects any application or server using Pillow.

Exploitation Status

The exploitation status is currently unknown. Monitor vendor advisories and security bulletins for updates.

Timeline

Newly disclosed

Remediation

Developers should update to the latest version of Pillow once a patch is released. In the meantime, avoid processing untrusted EPS files, or implement strict validation checks on file names before passing them to Ghostscript.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to CVE, Vulnerability, Critical.

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