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

Quick assessment

Affected
python-pillow Pillow
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

CVSS 7.5 · High EPSS 0.64% · P49

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
python-pillow Pillow < 12.3.0 affected
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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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的内存分配
Source: CVE Program / CVE List V5
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

Vendor Product Affected Versions CPE Subscribe
python-pillow Pillow < 12.3.0 -

II. Public POCs for CVE-2026-54060

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 10002 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

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-2026-54059 7.5 HIGH Pillow: PcfFontFile._load_bitmaps()`: `Image.frombytes()` called without `_decompression_b
CVE-2026-55380 7.5 HIGH Pillow GdImageFile decompression bomb protection bypass
CVE-2026-55379 7.5 HIGH Pillow BdfFontFile`: `Image.new()` called without `_decompression_bomb_check()` — bomb pro
CVE-2026-55798 4.5 MEDIUM Pillow: 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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