## Pillow: Image.quantize() with empty palette leaks uninitialized stack memory

- 種別: advisory
- 重大度: medium
- 関連技術: python
- CVE: CVE-2026-112898
- 公開日時: 2026-10-21T20:44:07.000Z
- 情報源: GitHub Advisory Database (https://github.com/advisories/GHSA-rfgq-q3w2-pmv2)
- パーマリンク: https://vulnpulse.app/items/ghsa-ghsa-rfgq-q3w2-pmv2

影響: pip:Pillow >= 9.1.0, < 13.0.0 → 13.0.0
============================================================================ Image.quantize() with empty palette leaks uninitialized stack memory Location: src/libImaging/Palette.c:216 in ImagingPaletteCacheUpdate() Commit: a707c6b21c313880d0771e54965d142dd42358b6 ============================================================================ When an application lets a user supply the palette image for Pillow's Image.quantize(palette=...), the user can get back 512 bytes of the server process's st…