NetSight
IP …
high7.5

CVE-2026-40192

FITS GZIP decompression bomb in Pillow

Impact

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.

Affected packages

EcosystemPackageAffectedFixed in
pippillow>= 10.3.0, < 12.2.012.2.0

Affected products

VendorProductAffected versions
PythonPillow
from 10.3.0 before 12.2.0

Weakness classification

CWE-400CWE-770CWE-409

References