CVE-2026-40192

Summary

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 Software

VendorProductVersion RangeStatus
python-pillowPillow>= 10.3.0, < 12.2.0affected

Weaknesses

  • CWE-770: CWE-770: Allocation of Resources Without Limits or Throttling
  • CWE-400: CWE-400: Uncontrolled Resource Consumption

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

Pillow: Pillow: Denial of Service via decompression bomb in FITS image processing

Additional References

References