CVE-2026-40192 — Pillow is vulnerable to a FITS GZIP decompression bomb
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 de…
Published: 2026-04-15 · CVSS: 8.7 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7