Integer Overflow or Wraparound 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-21431005
- published22 Oct 2026
- disclosed21 Oct 2026
- creditMengxi-Xu
Introduced: 21 Oct 2026
NewCVE-2026-96641 (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 Integer Overflow or Wraparound via the textwidth function in src/_imaging.c, where accumulating negative glyph advance widths can cause the integer accumulator xsize to wrap below INT_MIN. An attacker can trigger this by supplying text whose cumulative rendered width underflows a signed 32-bit integer, causing an OverflowError that crashes the calling process.