High 8.7Published Apr 15, 2026

CVE-2026-40192Pillow is vulnerable to a FITS GZIP decompression bomb

Updated under an hour ago (Oct 26, 2026, 4:50 PM ET)

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It affects python-pillow Pillow and 11 other products. Add what you run to find out whether that includes you.

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Every CVE for python-pillow Pillow

Exploited in the last 30 days

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.

CVSS: 8.7 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness (CWE): CWE-770, CWE-400, CWE-409
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Modified
Record last updated: Sep 10, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

python-pillow Pillow python_pillow:pillow (from the name)	from 10.3.0, < 12.2.0	CNA record
Red Hat Red Hat Ansible Automation Platform 2.5 for RHEL 8 redhat:ansible_automation_platform	from 0:12.2.0-1.el8ap not affected	CISA ADP
Red Hat Red Hat Satellite 6.16 for RHEL 8 redhat:satellite	from 0:12.2.0-1.el8pc not affected	CISA ADP
Red Hat Red Hat Satellite 6.16 for RHEL 8 redhat:satellite_capsule	from 0:12.2.0-1.el8pc not affected	CISA ADP
Red Hat Red Hat AI Inference Server 3.2 redhat:ai_inference_server	from 1787860580 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux AI 3.3 redhat:enterprise_linux_ai	from 1778690639 not affected	CISA ADP
Red Hat Red Hat OpenShift AI 2.25 redhat:openshift_ai	from 1780388133 not affected	CISA ADP
Red Hat Red Hat Quay 3.10 redhat:quay	from 1779822261 not affected	CISA ADP
Red Hat Lightspeed Core redhat:lightspeed_core	All versions	CISA ADP
Red Hat OpenShift Lightspeed redhat:openshift_lightspeed	Versions not stated	CISA ADP
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References

References

https://github.com/python-pillow/Pillow/security/advisories/GHSA-whj4-6x5x-4v2j	x-refsource-confirm, mitigation, patch, vendor-advisory
https://github.com/python-pillow/Pillow/pull/9521	x-refsource-misc, issue-tracking, patch
https://github.com/python-pillow/Pillow/commit/3cb854e8b2bab43f40e342e665f9340d861aa628	x-refsource-misc, patch
https://pillow.readthedocs.io/en/stable/releasenotes/12.2.0.html#prevent-fits-decompression-bomb	x-refsource-misc, release-notes
https://access.redhat.com/errata/RHSA-2026:16008
https://access.redhat.com/errata/RHSA-2026:16009
https://access.redhat.com/errata/RHSA-2026:16030
https://access.redhat.com/errata/RHSA-2026:16174
https://access.redhat.com/errata/RHSA-2026:17609
https://access.redhat.com/errata/RHSA-2026:17611
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.