CVE-2026-54060: 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)) withou
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.
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-54060
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-540600.36% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 28% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-54060 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for Pillow is a
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- high[NEW] [high] Red Hat Satellite (foreman, python-pillow, go): Multiple vulnerabilitiescert-bund · 2026-07-10
- mediumCVE-2026-55798: Pillow is a Python imaging library. Prior to 12.3.0, WindowsViewer.get_command() constructed a…nvd · 2026-07-06
- highCVE-2026-55380: Pillow is a Python imaging library. Prior to 12.3.0, PIL/GdImageFile.py GdImageFile._open() re…nvd · 2026-07-06
- highCVE-2026-55379: Pillow is a Python imaging library. Prior to 12.3.0, PIL/BdfFontFile.py bdf_char() read the BB…nvd · 2026-07-06
- highCVE-2026-54059: Pillow is a Python imaging library. Prior to 12.3.0, PIL/PcfFontFile.py _load_bitmaps() read g…nvd · 2026-07-06
- unknownDSA-6357-1 pillow - security updatedebian · 2026-06-21
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