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TI-2026-29006 Aliases CVE-2026-40192GHSA-whj4-6x5x-4v2j

Pillow is vulnerable to a FITS GZIP decompression bomb

Priority MEDIUM 45CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 22 fixed, 7 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-400.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00671 52nd percentileScored 2026-11-07
Fix Partial Pillow (python-pillow): 12.2.0pillow (PyPI): 12.2.0Red Hat: 28 advisoriesRed Hat: 22 fixed, 7 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
python-pillowPillow10.3.0 to before 12.2.012.2.0Patch availableCNA
—pillow (PyPI)10.3.0 to before 12.2.012.2.0Patch availableGHSA-whj4-6x5x-4v2j
  • Pillow Vendorpython-pillow Affected 10.3.0 to before 12.2.0 Fixed in 12.2.0 Patch available CNA
  • pillow (PyPI) Vendor— Affected 10.3.0 to before 12.2.0 Fixed in 12.2.0 Patch available GHSA-whj4-6x5x-4v2j

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*10.3.0 to before 12.2.0Vulnerablepython-pillow
  • cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:* Versions 10.3.0 to before 12.2.0 Vulnerable ·python-pillow

Remediation

  • Fix · CNA Pillow (python-pillow) Fixed in 12.2.0
  • Fix · GHSA-whj4-6x5x-4v2j pillow (PyPI) Fixed in 12.2.0 Advisory →

Red Hat 28 advisories

  • RHSA-2026:65126 Released 2026-09-08 · Red Hat rating Important
    RHOAI 2.25.11 - Red Hat OpenShift AI
    • Red Hat OpenShift AI 2.25 registry.redhat.io/rhoai/odh-built-in-detector-rhel9, registry.redhat.io/rhoai/odh-caikit-tgis-serving-rhel9, registry.redhat.io/rhoai/odh-dashboard-rhel9 +47
  • RHSA-2026:61629 Released 2026-08-31 · Red Hat rating Important
    Red Hat AI Inference Server 3.2.2 (ROCm)
    • Red Hat AI Inference Server 3.2 registry.redhat.io/rhaiis/vllm-rocm-rhel9
  • RHSA-2026:61628 Released 2026-08-31 · Red Hat rating Important
    Red Hat AI Inference Server Model Optimization Tools 3.2.2 (CUDA)
    • Red Hat AI Inference Server 3.2 registry.redhat.io/rhaiis/model-opt-cuda-rhel9
Show 25 more Red Hat advisories
  • RHSA-2026:61627 Released 2026-08-31 · Red Hat rating Important
    Red Hat AI Inference Server 3.2.2 (CUDA)
    • Red Hat AI Inference Server 3.2 registry.redhat.io/rhaiis/vllm-cuda-rhel9
  • RHSA-2026:57387 Released 2026-08-20 · Red Hat rating Important
    Red Hat AI Inference 3.4.4 (spyre)
    • Red Hat AI Inference Server 3.4 registry.redhat.io/rhaii/vllm-spyre-rhel9
  • RHSA-2026:37275 Released 2026-07-09 · Red Hat rating Critical
    RHOAI 3.3.5 - Red Hat OpenShift AI
    • Red Hat OpenShift AI 3.3 registry.redhat.io/rhoai/odh-dashboard-rhel9, registry.redhat.io/rhoai/odh-data-science-pipelines-operator-controller-rhel9, registry.redhat.io/rhoai/odh-feast-operator-rhel9 +45
  • RHSA-2026:34365 Released 2026-07-01 · Red Hat rating Important
    Satellite 6.19.2 Async Update
    • Red Hat Satellite 6.19 for RHEL 9 candlepin-4.7.5-1.el9sat, candlepin-selinux-4.7.5-1.el9sat, foreman-3.18.0.7-1.el9sat +17
  • RHSA-2026:34368 Released 2026-07-01 · Red Hat rating Important
    Satellite 6.18.7 Async Update
    • Red Hat Satellite 6.18 for RHEL 9 foreman-3.16.0.17-1.el9sat, foreman-cli-3.16.0.17-1.el9sat, foreman-debug-3.16.0.17-1.el9sat +13
  • RHSA-2026:34366 Released 2026-07-01 · Red Hat rating Important
    Satellite 6.17.9 Async Update
    • Red Hat Satellite 6.17 for RHEL 9 dynflow-utils-1.6.3-1.1.el9sat, foreman-3.14.0.17-1.el9sat, foreman-cli-3.14.0.17-1.el9sat +16
  • RHSA-2026:27076 Released 2026-06-18 · Red Hat rating Important
    Satellite 6.16.9 Async Update
    • Red Hat Satellite 6.16 for RHEL 8 dynflow-utils-1.6.3-1.1.el8sat, python-pillow-12.2.0-1.el8pc, python3.11-pillow-12.2.0-1.el8pc +1
    • Red Hat Satellite 6.16 for RHEL 9 dynflow-utils-1.6.3-1.1.el9sat, python-pillow-12.2.0-1.el9pc, python3.11-pillow-12.2.0-1.el9pc +1
  • RHSA-2026:24977 Released 2026-06-10 · Red Hat rating Important
    RHOAI 2.25.7 - Red Hat OpenShift AI
    • Red Hat OpenShift AI 2.25 registry.redhat.io/rhoai/odh-caikit-nlp-rhel9, registry.redhat.io/rhoai/odh-caikit-tgis-serving-rhel9, registry.redhat.io/rhoai/odh-dashboard-rhel9 +34
  • RHSA-2026:24866 Released 2026-06-09 · Red Hat rating Critical
    Red Hat Ansible Automation Platform 2.6 Container Release Update
    • Red Hat Ansible Automation Platform 2.6 registry.redhat.io/ansible-automation-platform-26/controller-rhel9, registry.redhat.io/ansible-automation-platform-26/eda-controller-rhel9, registry.redhat.io/ansible-automation-platform-26/ee-supported-rhel9 +7
  • RHSA-2026:24853 Released 2026-06-09 · Red Hat rating Important
    Red Hat Quay 3.15.5
    • Red Hat Quay 3.15 registry.redhat.io/quay/quay-rhel8
  • RHSA-2026:24761 Released 2026-06-09 · Red Hat rating Important
    Red Hat Ansible Automation Platform 2.5 Product Security and Bug Fix Update
    • Red Hat Ansible Automation Platform 2.5 for RHEL 8 automation-controller-venv-tower-4.6.29-2.el8ap, automation-gateway-proxy-server-2.5.10-6.el8ap, automation-gateway-server-2.5.20260422-3.el8ap +4
    • Red Hat Ansible Automation Platform 2.5 for RHEL 9 automation-controller-venv-tower-4.6.29-2.el9ap, automation-gateway-proxy-server-2.6.14-3.el9ap, automation-gateway-server-2.5.20260422-3.el9ap +4
  • RHSA-2026:24762 Released 2026-06-09 · Red Hat rating Important
    Red Hat Ansible Automation Platform 2.6 Product Security and Bug Fix Update
    • Red Hat Ansible Automation Platform 2.6 for RHEL 10 python3-click-8.3.3-1.el10ap, receptor-1.6.5-1.el10ap, receptorctl-1.6.5-1.el10ap
    • Red Hat Ansible Automation Platform 2.6 for RHEL 9 automation-controller-4.7.12-1.el9ap, automation-controller-cli-4.7.12-1.el9ap, automation-controller-server-4.7.12-1.el9ap +10
  • RHSA-2026:23361 Released 2026-06-04 · Red Hat rating Important
    Red Hat Quay 3.9.22
    • Red Hat Quay 3.9 registry.redhat.io/quay/quay-rhel8
  • RHSA-2026:22840 Released 2026-06-03 · Red Hat rating Important
    Red Hat Quay 3.10.22
    • Red Hat Quay 3.10 registry.redhat.io/quay/quay-rhel8
  • RHSA-2026:22629 Released 2026-06-02 · Red Hat rating Important
    Red Hat Quay 3.12.18
    • Red Hat Quay 3.12 registry.redhat.io/quay/quay-rhel8
  • RHSA-2026:22465 Released 2026-06-02 · Red Hat rating Important
    Red Hat Quay 3.17.2
    • Red Hat Quay 3.17 registry.redhat.io/quay/quay-rhel9
  • RHSA-2026:21017 Released 2026-05-26 · Red Hat rating Important
    Red Hat Quay 3.14.8
    • Red Hat Quay 3.14 registry.redhat.io/quay/quay-rhel8
  • RHSA-2026:19712 Released 2026-05-20 · Red Hat rating Critical
    RHOAI 3.3.3 - Red Hat OpenShift AI
    • Red Hat OpenShift AI 3.3 registry.redhat.io/rhoai/odh-built-in-detector-rhel9, registry.redhat.io/rhoai/odh-dashboard-rhel9, registry.redhat.io/rhoai/odh-data-science-pipelines-argo-argoexec-rhel9 +33
  • RHSA-2026:19375 Released 2026-05-19 · Red Hat rating Important
    Red Hat Quay 3.16.4
    • Red Hat Quay 3.16 registry.redhat.io/quay/quay-rhel9
  • RHSA-2026:17611 Released 2026-05-14 · Red Hat rating Important
    Red Hat Enterprise Linux AI 3.3.3
    • Red Hat Enterprise Linux AI 3.3 registry.redhat.io/rhelai3/bootc-aws-cuda-rhel9, registry.redhat.io/rhelai3/bootc-azure-cuda-rhel9, registry.redhat.io/rhelai3/bootc-azure-rocm-rhel9 +3
  • RHSA-2026:17609 Released 2026-05-14 · Red Hat rating Important
    Red Hat Enterprise Linux AI 3.3.3
    • Red Hat Enterprise Linux AI 3.3 registry.redhat.io/rhelai3/disk-image-cuda-rhel9
  • RHSA-2026:16174 Released 2026-05-12 · Red Hat rating Important
    Red Hat AI Inference Server 3.3.3 (Spyre)
    • Red Hat AI Inference Server 3.3 registry.redhat.io/rhaiis/vllm-spyre-rhel9
  • RHSA-2026:16030 Released 2026-05-11 · Red Hat rating Important
    Red Hat AI Inference Server 3.3.3 (CUDA)
    • Red Hat AI Inference Server 3.3 registry.redhat.io/rhaiis/vllm-cuda-rhel9
  • RHSA-2026:16009 Released 2026-05-11 · Red Hat rating Important
    Red Hat AI Inference Server 3.3.3 (ROCm)
    • Red Hat AI Inference Server 3.3 registry.redhat.io/rhaiis/vllm-rocm-rhel9
  • RHSA-2026:16008 Released 2026-05-11 · Red Hat rating Important
    Red Hat AI Inference Server Model Optimization Tools 3.3.3 (CUDA)
    • Red Hat AI Inference Server 3.3 registry.redhat.io/rhaiis/model-opt-cuda-rhel9

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Lightspeed CoreAffectedNo fix yet
OpenShift LightspeedAffectedNo fix yet
Red Hat AI Inference ServerAffectedNo fix planned: Will not fix
Red Hat Ansible Automation Platform 2AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 8AffectedNo fix planned: Will not fix
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet
Red Hat AI Inference Server 3.2Fixed RHSA-2026:61627, RHSA-2026:61628, RHSA-2026:61629
Red Hat AI Inference Server 3.3Fixed RHSA-2026:16008, RHSA-2026:16009, RHSA-2026:16030, RHSA-2026:16174
Red Hat AI Inference Server 3.4Fixed RHSA-2026:57387
Red Hat Ansible Automation Platform 2.5 for RHEL 8Fixed RHSA-2026:24761
Red Hat Ansible Automation Platform 2.5 for RHEL 9Fixed RHSA-2026:24761
Red Hat Ansible Automation Platform 2.6Fixed RHSA-2026:24866
Red Hat Ansible Automation Platform 2.6 for RHEL 9Fixed RHSA-2026:24762
Red Hat Enterprise Linux AI 3.3Fixed RHSA-2026:17609, RHSA-2026:17611
Red Hat OpenShift AI 2.25Fixed RHSA-2026:24977, RHSA-2026:65126
Red Hat OpenShift AI 3.3Fixed RHSA-2026:19712, RHSA-2026:37275
Red Hat Quay 3.10Fixed RHSA-2026:22840
Red Hat Quay 3.12Fixed RHSA-2026:22629
Red Hat Quay 3.14Fixed RHSA-2026:21017
Red Hat Quay 3.15Fixed RHSA-2026:24853
Red Hat Quay 3.16Fixed RHSA-2026:19375
Red Hat Quay 3.17Fixed RHSA-2026:22465
Red Hat Quay 3.9Fixed RHSA-2026:23361
Red Hat Satellite 6.16 for RHEL 8Fixed RHSA-2026:27076
Red Hat Satellite 6.16 for RHEL 9Fixed RHSA-2026:27076
Red Hat Satellite 6.17 for RHEL 9Fixed RHSA-2026:34366
Red Hat Satellite 6.18 for RHEL 9Fixed RHSA-2026:34368
Red Hat Satellite 6.19 for RHEL 9Fixed RHSA-2026:34365
Not affected: 22 products
  • OpenShift Lightspeed
  • Red Hat Ansible Automation Platform 2
  • Red Hat Ansible Automation Platform 2.5 for RHEL 8
  • Red Hat Ansible Automation Platform 2.5 for RHEL 9
  • Red Hat Ansible Automation Platform 2.6
  • Red Hat Ansible Automation Platform 2.6 for RHEL 10
  • Red Hat Ansible Automation Platform 2.6 for RHEL 9
  • Red Hat OpenShift AI (RHOAI)
  • Red Hat OpenShift AI 2.25
  • Red Hat OpenShift AI 3.3
  • Red Hat Quay 3.10
  • Red Hat Quay 3.12
  • Red Hat Quay 3.14
  • Red Hat Quay 3.15
  • Red Hat Quay 3.16
  • Red Hat Quay 3.17
  • Red Hat Quay 3.9
  • Red Hat Satellite 6.16 for RHEL 8
  • Red Hat Satellite 6.16 for RHEL 9
  • Red Hat Satellite 6.17 for RHEL 9
  • Red Hat Satellite 6.18 for RHEL 9
  • Red Hat Satellite 6.19 for RHEL 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-40192
  2. 2026-10-03 Alias added: GHSA-whj4-6x5x-4v2j

References

Patch 3

Advisory 1

Other 2

  • TI-2026-76627 Out-of-bounds read in Pillow TIFF encoder ColorMap handling CVSS 4.0HIGH 8.8
  • TI-2026-76625 Quadratic-time denial of service in Pillow PDF save_all CVSS 4.0HIGH 8.7
  • TI-2026-76605 NULL pointer dereference in Pillow's Image.merge function CVSS 4.0HIGH 8.7
  • TI-2026-76604 Out-of-bounds read in Pillow TIFF decoding leaks heap memory CVSS 4.0HIGH 8.8
  • TI-2026-76602 Double free in Pillow ImagingScaleAffine on allocation failure CVSS 4.0HIGH 8.7
  • TI-2026-76600 GIF seek in Pillow keeps rejected size, allowing denial of service CVSS 4.0HIGH 8.7
See all 110 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences