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CVE-2026-54060— Pillow: `FontFile.compile()`: `Image.new()` called without `_decompression_bomb_check()`

CVSS 7.5 · High EPSS 0.36% · P28

Possible ATT&CK Techniques 1AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProductVersion RangeStatus
python-pillowPillow< 12.3.0affected
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I. Basic Information for CVE-2026-54060

Vulnerability Information
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Vulnerability Title
Pillow: `FontFile.compile()`: `Image.new()` called without `_decompression_bomb_check()`
Source: NVD (National Vulnerability Database)
Vulnerability Description
Pillow is a Python imaging library. Prior to 12.3.0, PIL/FontFile.py FontFile.compile() assembled per-glyph images into a combined bitmap with Image.new("1", (xsize, ysize)) without calling Image._decompression_bomb_check(), allowing a font to trigger excessive allocation during conversion or saving. This issue is fixed in version 12.3.0.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未经控制的内存分配
Source: NVD (National Vulnerability Database)
Vulnerability Title
Pillow 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Pillow是Pillow组织开源的一款基于Python的图像处理库。 Pillow 12.3.0之前版本存在资源管理错误漏洞，该漏洞源于在组装字体字形图像时未调用Image._decompression_bomb_check()，可能导致转换或保存过程中触发过度内存分配。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
python-pillowPillow < 12.3.0 -

II. Public POCs for CVE-2026-54060

#POC DescriptionSource LinkShenlong Link
AI-Generated POCVerified env Premium
Qwen3.6-35B-A3B · 10002 chars
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III. Intelligence Information for CVE-2026-54060

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Patches & Fixes for CVE-2026-54060 (1)

Vendor Advisories for CVE-2026-54060 (1)

Vendor Pages for CVE-2026-54060 (1)

Same Patch Batch · python-pillow · 2026-07-06 · 5 CVEs total

CVE-2026-540597.5 HIGHPillow: PcfFontFile._load_bitmaps()`: `Image.frombytes()` called without `_decompression_b
CVE-2026-553807.5 HIGHPillow GdImageFile decompression bomb protection bypass
CVE-2026-553797.5 HIGHPillow BdfFontFile`: `Image.new()` called without `_decompression_bomb_check()` — bomb pro
CVE-2026-557984.5 MEDIUMPillow: WindowsViewer.get_command() OS command injection via unescaped shell path

IV. Related Vulnerabilities

Same product: Pillow
Same vendor: python-pillow
Same weakness: CWE-789

V. Comments for CVE-2026-54060

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