CVE-2026-40192
HIGH WAF: Medium
CVSS 7.5
Published: 2026-04-15
CWE-400
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.
WAF Coverage Analysis
Uncontrolled Resource Consumption
Medium WAF Coverage
OWASP: A05:2021 Security Misconfiguration
912xxx - DOS Protection
Affected Software
| Vendor | Product | Version |
|---|---|---|
| python | pillow | 10.3.0 - 12.2.0 |
References
- github.com (Patch)
- github.com (Issue Tracking, Patch)
- github.com (Mitigation, Patch, Vendor Advisory)
- pillow.readthedocs.io (Release Notes)