Inefficient Algorithmic Complexity Affecting pillow package, versions [9.2.0,12.3.0)
Threat Intelligence
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-21277792
- published20 Oct 2026
- disclosed19 Oct 2026
- creditSyed Mohammad Ibrahim
Introduced: 19 Oct 2026
NewCVE-2026-112891 (opens in a new tab)How to fix?
Upgrade pillow to version 12.3.0 or higher.
Overview
Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity via repeated string concatenation in the _seek function of src/PIL/GifImagePlugin.py when parsing GIF comment extension blocks. An attacker can supply a GIF file containing many comment blocks, causing quadratic memory growth through repeated bytes concatenation on each block read, which crashes the process.