# CVE-2026-112893: Pillow use-after-free in FreeType glyph rendering with stroker

Source: https://junglewise.ai/threats/cve-2026-112893-pillow-is-a-python-imaging-library-from-10-0-0-until-13-0-0  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-19. Updated: 2026-10-19  
License: CC BY 4.0 with a link back

CVE-2026-112893 · Severity: high · CVSS 4 · Published 2026-10-19

Pillow is a Python library for image processing and manipulation. An attacker can supply a malformed font file to an application using Pillow to draw text with a stroke effect, triggering a memory corruption flaw that crashes the process or potentially corrupts application data. The vulnerability affects versions 10.0.0 through 12.x.

Technologies: [pillow (PyPI)](https://junglewise.ai/threats/technologies/pillow), [Python Pillow Project Pillow](https://junglewise.ai/threats/technologies/python-pillow-project-pillow). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi), [Python Pillow Project](https://junglewise.ai/threats/vendors/python-pillow-project).

## Quick answers

**Is CVE-2026-112893 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-112893 being exploited in the wild.

**How severe is CVE-2026-112893?** High severity, with a CVSS score of 4, published 19 October 2026.

**Which products and versions are affected?** pillow (PyPI) >= 10.0.0, < 13.0.0, ECOSYSTEM:introduced=10.0.0,fixed=13.0.0; Python Pillow Project Pillow 10.0.0 through 12.x.

**Is there a fix for CVE-2026-112893?** Yes. pillow (PyPI): upgrade to 13.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-112893 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-112893?** Check whether you run pillow (PyPI) or Python Pillow Project Pillow at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- pillow (PyPI): upgrade to 13.0.0 or later

  ```sh
  pip install "pillow>=13.0.0"
  ```


## Technical details

A use-after-free vulnerability exists in the FreeType glyph rendering code when a stroker is active. If FT_Load_Glyph fails, the cleanup code attempts to free an uninitialized or stale glyph pointer via FT_Done_Glyph, causing heap corruption. An attacker can trigger the glyph-load failure path by supplying a crafted font file to any application that renders text with nonzero stroke width. The fix initializes the glyph pointer to NULL and adds proper cleanup guards.

## Affected products

- Python Pillow Project Pillow 10.0.0 through 12.x

## Identifiers

- CVE-2026-112893
- GHSA-j4m9-6w36-pw47

## Timeline

- 2026-10-19: disclosed
- 2026-10-16: patched: Fix released in version 13.0.0

## References

- [https://github.com/python-pillow/Pillow/commit/a7416de7f3a43128179d2cf68df3240ea8dafe13](https://github.com/python-pillow/Pillow/commit/a7416de7f3a43128179d2cf68df3240ea8dafe13)
- [https://github.com/python-pillow/Pillow/releases/tag/13.0.0](https://github.com/python-pillow/Pillow/releases/tag/13.0.0)

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