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Fencer Vulns
high 8.2

CVE-2026-59197 json

Pillow: Heap out-of-bounds write in Pillow `ImageFilter.RankFilter` via integer overflow in `ImagingExpand`

published 2026-07-14 3 mo ago modified 2026-10-24 15 d ago also BIT-pillow-2026-59197 , EUVD-2026-43734 , GHSA-xj96-63gp-2gmr , PYSEC-2026-3454

cvss
8.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits
0
none known

Summary

Pillow is a Python imaging library. Prior to 12.3.0, Pillow's public rank-filter API can trigger a native heap out-of-bounds write when given a very large odd filter size because ImageFilter.RankFilter.filter() calls image.expand(size // 2, size // 2) before rank-filter size validation and ImagingExpand() computes output dimensions with unchecked signed int arithmetic. This issue is fixed in version 12.3.0.

Patch / fix

  • pypi pillow 12.3.0
  • bitnami pillow 12.3.0
  • python pillow 12.3.0
  • pillow Debian 14 12.3.0-1

debian advisories DEBIAN-CVE-2026-59197

  • pillow Ubuntu 22.04 LTS 9.0.1-1ubuntu0.6
  • pillow Ubuntu 24.04 LTS 10.2.0-1ubuntu1.4
  • pillow Ubuntu 26.04 LTS 12.1.1-2ubuntu1.4

ubuntu advisories UBUNTU-CVE-2026-59197

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • receptor ansible automation platform inside 2.5, ansible automation platform developer 2.5, ansible automation platform 2.5 1.6.7-1.el8ap
  • receptor ansible automation platform inside 2.6, ansible automation platform inside 2.5, ansible automation platform developer 2.6 +3 more 1.6.7-1.el9ap
  • receptorctl ansible automation platform inside 2.5, ansible automation platform developer 2.5, ansible automation platform 2.5 1.6.7-1.el8ap
  • receptorctl ansible automation platform inside 2.6, ansible automation platform inside 2.5, ansible automation platform developer 2.6 +3 more 1.6.7-1.el9ap
  • python3.12-daphne ansible automation platform 2.5 4.2.2-1.el8ap
  • python3.12-daphne ansible automation platform 2.6, ansible automation platform 2.5 4.2.2-1.el9ap
  • python3.12-pillow ansible automation platform 2.5 12.3.0-1.el8ap
  • python3.12-pillow ansible automation platform 2.6, ansible automation platform 2.5 12.3.0-1.el9ap

red hat advisories RHSA-2026:54528RHSA-2026:54417RHSA-2026:52551RHSA-2026:50319RHSA-2026:50336RHSA-2026:50223

  • python-Pillow SLES 16.0, SLES for SAP applications 16.0 11.3.0-160000.8.1
  • python-Pillow SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 9.5.0-150400.5.25.1
  • python-Pillow SLE Module for Package Hub 15 SP7 7.2.0-150300.3.30.1

suse advisories SUSE-SU-2026:23217-1SUSE-SU-2026:23228-1SUSE-SU-2026:3268-1SUSE-SU-2026:3084-1

  • python-Pillow openSUSE Leap 16.0 11.3.0-160000.8.1

opensuse advisories openSUSE-SU-2026:21544-1

  • python3-pillow AlmaLinux 8 5.1.1-23.el8_10
  • python3-pillow-tk AlmaLinux 8 5.1.1-23.el8_10

almalinux advisories ALSA-2026:48021

  • python-pillow Rocky Linux 8 5.1.1-23.el8_10

rocky linux advisories RLSA-2026:48021

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-59197 updated cvss 8.2

Pillow: Pillow: Native heap out-of-bounds write

  • Red Hat Exploit Intelligence exploit-intelligence-tech-preview/vulnerability-analysis-rhel9 Red Hat Lightspeed Core lightspeed-core/rag-tool-cpu-rhel9, lightspeed-core/lightspeed-stack-rhel9, lightspeed-core/rag-tool-cuda-12.9-rhel9 Red Hat OpenShift Lightspeed openshift-lightspeed/lightspeed-service-api-rhel9
    affected: no fix available
  • Red Hat AI Inference Server rhaii/vllm-tpu-rhel9, rhaiis/vllm-cpu-rhel9, rhaiis/vllm-tpu-rhel9, rhaii/vllm-gaudi-rhel9, rhaiis/vllm-cuda-rhel9, rhaiis/vllm-rocm-rhel9, +4 more
    affected: no fix available, no fix planned “Will not fix”
  • Red Hat Ansible Automation Platform 2 ansible-automation-platform-25/lightspeed-chatbot-rhel8
    affected: no fix available
  • Red Hat Enterprise Linux AI (RHEL AI) 3 rhelai3/bootc-gaudi-rhel9
    affected: no fix planned “Will not fix”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-vllm-gaudi-rhel9, rhoai/odh-llama-stack-core-rhel9, rhoai/odh-caikit-tgis-serving-rhel9, rhoai/odh-workbench-jupyter-pytorch-llmcompressor-cuda-py312-rhel9 Red Hat Satellite 6 python-pillow 12.2.0-1.el8pc
    affected: no fix available
  • Red Hat AI Inference Server 3.4 rhaii/vllm-cpu-rhel9 1789681128, rhaii/vllm-cpu-rhel9 1790075793, rhaii/vllm-cuda-rhel9 1789681126, rhaii/vllm-cuda-rhel9 1790090131, rhaii/vllm-rocm-rhel9 1789681126, rhaii/vllm-rocm-rhel9 1790109620, +4 more
    fixed: vendor fix RHSA-2026:70996
  • Red Hat Ansible Automation Platform 2.5 for RHEL 8 python3.12-pillow 12.3.0-1.el8ap Red Hat Ansible Automation Platform 2.5 for RHEL 9 python3.12-pillow 12.3.0-1.el9ap
    fixed: vendor fix RHSA-2026:50319
  • Red Hat Ansible Automation Platform 2.6 ansible-automation-platform-26/hub-rhel9 1785753568, ansible-automation-platform-26/lightspeed-chatbot-rhel9 1785646188
    fixed: vendor fix RHSA-2026:50479
show 24 more
  • Red Hat Ansible Automation Platform 2.6 for RHEL 9 python3.12-pillow 12.3.0-1.el9ap
    fixed: vendor fix RHSA-2026:50336
  • Red Hat Ansible Automation Platform 2.7 ansible-automation-platform-27/hub-rhel9 1785376164, ansible-automation-platform-27/lightspeed-chatbot-rhel9 1785426734
    fixed: vendor fix RHSA-2026:50340
  • Red Hat Enterprise Linux AI 3.4 rhelai3/bootc-cuda-rhel9 1790868254, rhelai3/bootc-rocm-rhel9 1790614447, rhelai3/bootc-aws-cuda-rhel9 1790881122, rhelai3/bootc-gcp-cuda-rhel9 1790881123, rhelai3/disk-image-cuda-rhel9 1790957417, rhelai3/bootc-azure-cuda-rhel9 1790881120, +1 more
    fixed: vendor fix RHSA-2026:76150
  • Red Hat Enterprise Linux AppStream (v. 8) python-pillow 5.1.1-23.el8_10, python3-pillow 5.1.1-23.el8_10
    fixed: vendor fix RHSA-2026:48021
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) python-pillow 5.1.1-15.el8_4.2, python3-pillow 5.1.1-15.el8_4.2
    fixed: vendor fix RHSA-2026:52551
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) python-pillow 5.1.1-20.el8_6.1, python3-pillow 5.1.1-20.el8_6.1
    fixed: vendor fix RHSA-2026:54528
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) python-pillow 5.1.1-20.el8_8.1, python3-pillow 5.1.1-20.el8_8.1
    fixed: vendor fix RHSA-2026:54417
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) python-pillow 5.1.1-15.el8_4.2, python3-pillow 5.1.1-15.el8_4.2
    fixed: vendor fix RHSA-2026:52551
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) python-pillow 5.1.1-20.el8_6.1, python3-pillow 5.1.1-20.el8_6.1
    fixed: vendor fix RHSA-2026:54528
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) python-pillow 5.1.1-20.el8_8.1, python3-pillow 5.1.1-20.el8_8.1
    fixed: vendor fix RHSA-2026:54417
  • Red Hat Enterprise Linux CRB (v. 8) python3-pillow 5.1.1-23.el8_10, python3-pillow-tk 5.1.1-23.el8_10
    fixed: vendor fix RHSA-2026:48021
  • Red Hat OpenShift AI 3.3 rhoai/odh-mlflow-rhel9 1789653606, rhoai/odh-llm-d-inference-scheduler-rhel9 1789662430
    fixed: vendor fix RHSA-2026:73987
  • Red Hat OpenShift AI 3.4 rhoai/odh-automl-rhel9 1786612415, rhoai/odh-mlflow-rhel9 1787226790, rhoai/odh-autorag-rhel9 1786612637, rhoai/odh-llm-d-kv-cache-rhel9 1787169432, rhoai/odh-openvino-model-server-rhel9 1787303251, rhoai/odh-th06-cpu-torch210-py312-rhel9 1787076778, +18 more
    fixed: vendor fix RHSA-2026:60520
  • Red Hat Quay 3.9 quay/quay-rhel8 1785950004
    fixed: vendor fix RHSA-2026:50931
  • Red Hat Quay 3.10 quay/quay-rhel8 1786395065
    fixed: vendor fix RHSA-2026:53520
  • Red Hat Quay 3.12 quay/quay-rhel8 1786170635
    fixed: vendor fix RHSA-2026:52968
  • Red Hat Quay 3.14 quay/quay-rhel8 1788593843
    fixed: vendor fix RHSA-2026:70267
  • Red Hat Quay 3.15 quay/quay-rhel8 1785261506
    fixed: vendor fix RHSA-2026:48933
  • Red Hat Quay 3.16 quay/quay-rhel9 1789563753
    fixed: vendor fix RHSA-2026:69255
  • Red Hat Quay 3.17 quay/quay-rhel9 1786181981
    fixed: vendor fix RHSA-2026:54395
  • Red Hat Quay 3.18 quay/quay-rhel9 1791265590
    fixed: vendor fix RHSA-2026:81110
  • Red Hat Satellite 6.16 for RHEL 8 python-pillow 12.3.0-1.el8pc, python3.11-pillow 12.3.0-1.el8pc Red Hat Satellite 6.16 for RHEL 9 python-pillow 12.3.0-1.el9pc, python3.11-pillow 12.3.0-1.el9pc
    fixed: vendor fix RHSA-2026:50223
  • Red Hat OpenShift Lightspeed openshift-lightspeed/lightspeed-ocp-rag-rhel9, openshift-lightspeed-tech-preview/lightspeed-rag-tool-rhel9
    not affected: vulnerable code not in execute path
  • Red Hat Ansible Automation Platform 2 python-pillow 10.3.0-1.el9ap Red Hat Ansible Automation Platform 2.5 for RHEL 8 receptor 1.6.7-1.el8ap, receptorctl 1.6.7-1.el8ap, automation-hub 4.10.17-1.el8ap, python3.12-daphne 4.2.2-1.el8ap, python3.12-pyasn1 0.6.4-1.el8ap, python3.12-aiohttp 3.14.1-2.el8ap, +17 more Red Hat Ansible Automation Platform 2.5 for RHEL 9 receptor 1.6.7-1.el9ap, receptorctl 1.6.7-1.el9ap, automation-hub 4.10.17-1.el9ap, python3.12-daphne 4.2.2-1.el9ap, python3.12-pyasn1 0.6.4-1.el9ap, python3.12-aiohttp 3.14.1-2.el9ap, +17 more Red Hat Ansible Automation Platform 2.6 ansible-automation-platform-26/gateway-rhel9 1785780020, ansible-automation-platform-26/hub-web-rhel9 1785756951, ansible-automation-platform-26/receptor-rhel9 1785632117, ansible-automation-platform-26/mcp-tools-rhel9 1785633968, ansible-automation-platform-26/controller-rhel9 1785753810, ansible-automation-platform-26/de-minimal-rhel9 1785647559, +23 more
    not affected: vulnerable code not present

17 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.45% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/python-pillow/Pillow/security/advisories/GHSA-xj96-63gp-2gmr referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
GitHub 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
OSV 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Affected packages

ecosystem package affected fixed in
pypi pillow
<12.3.0
12.3.0
bitnami pillow
<12.3.0
12.3.0

Affected products

  • python-pillow Pillow

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.