CVE-2026-40192: FITS GZIP decompression bomb in Pillow
(updated )
Pillow did not limit the amount of GZIP-compressed data read when decoding a FITS image, making it 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).
References
- github.com/advisories/GHSA-whj4-6x5x-4v2j
- github.com/python-pillow/Pillow/commit/3cb854e8b2bab43f40e342e665f9340d861aa628
- github.com/python-pillow/Pillow/pull/9521
- github.com/python-pillow/Pillow/security/advisories/GHSA-whj4-6x5x-4v2j
- nvd.nist.gov/vuln/detail/CVE-2026-40192
- pillow.readthedocs.io/en/stable/releasenotes/12.2.0.html
Code Behaviors & Features
Detect and mitigate CVE-2026-40192 with GitLab Dependency Scanning
Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →