Use of Uninitialized Variable Affecting pillow package, versions [10.0.0,12.3.0)


Severity

Recommended
0.0
high
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
0.29% (21st percentile)

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  • Snyk IDSNYK-PYTHON-PILLOW-21277794
  • published20 Oct 2026
  • disclosed19 Oct 2026
  • creditJoshua Rogers

Introduced: 19 Oct 2026

NewCVE-2026-112893  (opens in a new tab)
CWE-457  (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 Use of Uninitialized Variable via font_render_impl in src/_imagingft.c, where a FT_Glyph object can be freed via FT_Done_Glyph during the rendering loop when a stroker is active, and then freed a second time in the glyph_error cleanup path due to an incorrect guard condition. An attacker who can trigger font rendering with a stroker can cause a use-after-free, crashing the process.

CVSS Base Scores

version 4.0
version 3.1