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Vulnerabilities CVE-2026-40192

CVE-2026-40192

High
Open
TLP:CLEAR

Pillow is vulnerable to a FITS GZIP decompression bomb

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Description

Pillow is a Python imaging library. Versions 10.3.0 through 12.1.1 did not limit the amount of GZIP-compressed data read when decoding a FITS image, making them vulnerable to decompression bomb attacks. A specially crafted FITS file could cause unbounded memory consumption, leading to denial of service (OOM crash or severe performance degradation). If users are unable to immediately upgrade, they should only open specific image formats, excluding FITS, as a workaround.

Details

CVSS Score
8.7
EPSS Score
0.67%

48.8th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Confidence
90%
Published
Apr 15, 2026
Last Modified
Aug 12, 2026
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