# CVE-2026-40192

> Vulnerability · severity: **HIGH** (CVSS 7.5).

## 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.

## Key facts

- **CVE ID:** CVE-2026-40192
- **Published:** 2026-04-15
- **CVSS severity:** HIGH
- **CVSS base score:** 7.5
- **CWE codes:** CWE-400, CWE-770

## Affected products

- `python:pillow`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-40192

## Citation

> AI Analytics. CVE-2026-40192. Retrieved 2026-07-19 from https://api.ai-analytics.org/cve/CVE-2026-40192. Derived from NIST NVD. Licensed CC0.

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