Unchecked Input for Loop Condition 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-21430998
- published22 Oct 2026
- disclosed21 Oct 2026
- creditNuno Lopes
Introduced: 21 Oct 2026
NewCVE-2026-96643 (opens in a new tab)How to fix?
Upgrade pillow to version 13.0.0 or higher.
Overview
Affected versions of this package are vulnerable to Unchecked Input for Loop Condition via the load method in src/PIL/Image.py, where a loop consuming repeated Exif\x00\x00 headers in Exif data has no upper bound on iterations. An attacker can supply image data with an arbitrarily long sequence of repeated Exif headers, causing the process to spin indefinitely and crash the application.