Improper Handling of Highly Compressed Data (Data Amplification) Affecting pillow package, versions [,13.0.0)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-PILLOW-21431022
- published22 Oct 2026
- disclosed21 Oct 2026
- creditmohammad adnan
Introduced: 21 Oct 2026
NewCVE-2026-96636 (opens in a new tab)How to fix?
Upgrade Pillow to version 13.0.0 or higher.
Overview
Pillow is a PIL (Python Imaging Library) fork.
Affected versions of this package are vulnerable to Improper Handling of Highly Compressed Data (Data Amplification) via missing decompression bomb checks in the seek methods of DcxImagePlugin, MicImagePlugin, and MpoImagePlugin. When a multi-frame image file (DCX, MIC, or MPO format) is opened and frames are seeked, the per-frame image dimensions are never validated against the decompression bomb threshold, allowing an attacker to supply an image whose frames expand to an enormous size in memory and crash the process.