Uncontrolled Recursion Affecting pillow package, versions [5.1.0,13.0.0)
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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Start learning- Snyk IDSNYK-PYTHON-PILLOW-21277727
- published20 Oct 2026
- disclosed19 Oct 2026
- creditJoshua Rogers
Introduced: 19 Oct 2026
NewCVE-2026-112895 (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 Uncontrolled Recursion via linearize_page_tree in src/PIL/PdfParser.py, where a PDF file containing a deeply nested page tree causes unbounded recursion that exhausts the call stack. An attacker can supply a malicious PDF with an arbitrarily deep /Pages tree hierarchy to crash the process.