CVE-2026-55379CWE-789

Pillow BdfFontFile`: `Image.new()` called without `_decompression_bomb_check()` — bomb protection bypass via font loading

High · published July 6, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
35.4
In the wild
Unconfirmed
What it is

Pillow is a Python imaging library. Prior to 12.3.0, PIL/BdfFontFile.py bdf_char() read the BBX width and height field from a BDF font file and passed attacker-controlled dimensions to Image.new() without calling Image._decompression_bomb_check(), bypassing Pillow's documented decompression bomb protection and allowing excessive memory allocation. This issue is fixed in version 12.3.0.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00421 · 35.4th percentile
Weakness
CWE-789 · Memory Allocation with Excessive Size Value
Published
2026-07-06T18:52Z
EPSS history
Timeline
  • 06 JUL 18:52Z
    Pillow BdfFontFile`: `Image.new()` called without `_decompression_bomb_check()` — bomb protection bypass via font loading
    cvelistv5