High severity7.5NVD Advisory· Published Apr 15, 2026· Updated Apr 22, 2026
CVE-2026-40192
CVE-2026-40192
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.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
pillowPyPI | >= 10.3.0, < 12.2.0 | 12.2.0 |
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
6- github.com/python-pillow/Pillow/commit/3cb854e8b2bab43f40e342e665f9340d861aa628nvdPatchWEB
- github.com/python-pillow/Pillow/pull/9521nvdIssue TrackingPatchWEB
- github.com/python-pillow/Pillow/security/advisories/GHSA-whj4-6x5x-4v2jnvdMitigationPatchVendor AdvisoryWEB
- github.com/advisories/GHSA-whj4-6x5x-4v2jghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-40192ghsaADVISORY
- pillow.readthedocs.io/en/stable/releasenotes/12.2.0.htmlnvdRelease NotesWEB
News mentions
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