Copyright © 2012 Red Hat, Inc. All rights reserved. Important 2026-07-06T18:49:23 python-pillow: Pillow: Denial of Service via excessive memory allocation when processing font files 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CWE-1050

Pillow is a Python imaging library. Prior to 12.3.0, PIL/FontFile.py FontFile.compile() assembled per-glyph images into a combined bitmap with Image.new("1", (xsize, ysize)) without calling Image._decompression_bomb_check(), allowing a font to trigger excessive allocation during conversion or saving. This issue is fixed in version 12.3.0.

A flaw was found in Pillow, a Python imaging library. When processing a specially crafted font file, the library's font compilation function does not adequately check for excessive memory allocation. This oversight allows a remote attacker to trigger an unreasonable consumption of system memory, leading to a denial of service (DoS) for the application.

A flaw was found in Pillow prior to version 12.3.0. The FontFile.compile() method in PIL/FontFile.py assembles per-glyph images into a combined bitmap using Image.new() without calling Image._decompression_bomb_check(). This allows a specially crafted font file to trigger excessive memory allocation during conversion or saving, leading to denial of service via resource exhaustion. Red Hat Enterprise Linux 8 2026-07-14T00:00:00Z RHSA-2026:39127 python-pillow-0:5.1.1-22.el8_10 Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 2026-07-31T00:00:00Z RHSA-2026:48760 python-pillow-0:5.1.1-20.el8_6 Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 2026-07-31T00:00:00Z RHSA-2026:48760 python-pillow-0:5.1.1-20.el8_6 Red Hat Enterprise Linux 8.8 Telecommunications Update Service 2026-07-31T00:00:00Z RHSA-2026:48759 python-pillow-0:5.1.1-20.el8_8 Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 2026-07-31T00:00:00Z RHSA-2026:48759 python-pillow-0:5.1.1-20.el8_8 Red Hat Quay 3.15 2026-07-30T00:00:00Z RHSA-2026:48933 quay/quay-rhel8:1785261506 Exploit Intelligence Affected exploit-intelligence-tech-preview/vulnerability-analysis-rhel9 Lightspeed Core Affected lightspeed-core/lightspeed-stack-rhel9 OpenShift Lightspeed Not affected openshift-lightspeed/lightspeed-ocp-rag-rhel9 OpenShift Lightspeed Affected openshift-lightspeed/lightspeed-service-api-rhel9 OpenShift Lightspeed Not affected openshift-lightspeed-tech-preview/lightspeed-rag-tool-rhel9 Red Hat AI Inference Server Affected rhaii/model-opt-cuda-rhel9 Red Hat AI Inference Server Affected rhaiis/model-opt-cuda-rhel9 Red Hat AI Inference Server Will not fix rhaiis/vllm-cpu-rhel9 Red Hat AI Inference Server Affected rhaiis/vllm-cuda-rhel9 Red Hat AI Inference Server Will not fix rhaiis/vllm-neuron-rhel9 Red Hat AI Inference Server Affected rhaiis/vllm-rocm-rhel9 Red Hat AI Inference Server Affected rhaiis/vllm-spyre-rhel9 Red Hat AI Inference Server Will not fix rhaiis/vllm-tpu-rhel9 Red Hat AI Inference Server Affected rhaii/vllm-cpu-rhel9 Red Hat AI Inference Server Affected rhaii/vllm-cuda-rhel9 Red Hat AI Inference Server Will not fix rhaii/vllm-gaudi-rhel9 Red Hat AI Inference Server Will not fix rhaii/vllm-neuron-rhel9 Red Hat AI Inference Server Affected rhaii/vllm-rocm-rhel9 Red Hat AI Inference Server Affected rhaii/vllm-spyre-rhel9 Red Hat AI Inference Server Will not fix rhaii/vllm-tpu-rhel9 Red Hat Ansible Automation Platform 2 Will not fix ansible-automation-platform-25/lightspeed-chatbot-rhel8 Red Hat Ansible Automation Platform 2 Affected ansible-automation-platform-26/hub-rhel9 Red Hat Ansible Automation Platform 2 Affected ansible-automation-platform-26/lightspeed-chatbot-rhel9 Red Hat Ansible Automation Platform 2 Affected ansible-automation-platform-27/hub-rhel9 Red Hat Ansible Automation Platform 2 Affected ansible-automation-platform-27/lightspeed-chatbot-rhel9 Red Hat Ansible Automation Platform 2 Affected ansible-automation-platform/automation-dashboard-rhel9 Red Hat Ansible Automation Platform 2 Not affected python-pillow Red Hat Enterprise Linux 7 Not affected python-pillow Red Hat Enterprise Linux AI (RHEL AI) 3 Affected rhelai3/bootc-aws-cuda-rhel9 Red Hat Enterprise Linux AI (RHEL AI) 3 Affected rhelai3/bootc-azure-cuda-rhel9 Red Hat Enterprise Linux AI (RHEL AI) 3 Affected rhelai3/bootc-azure-rocm-rhel9 Red Hat Enterprise Linux AI (RHEL AI) 3 Affected rhelai3/bootc-cuda-rhel9 Red Hat Enterprise Linux AI (RHEL AI) 3 Affected rhelai3/bootc-gaudi-rhel9 Red Hat Enterprise Linux AI (RHEL AI) 3 Affected rhelai3/bootc-gcp-cuda-rhel9 Red Hat Enterprise Linux AI (RHEL AI) 3 Affected rhelai3/bootc-rocm-rhel9 Red Hat Enterprise Linux AI (RHEL AI) 3 Affected rhelai3/disk-image-cuda-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-automl-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-autorag-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-caikit-nlp-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-caikit-tgis-serving-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-kserve-agent-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-kserve-autogluon-server-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-kserve-controller-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-kserve-router-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-kserve-storage-initializer-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-llama-stack-core-rhel9 Red Hat OpenShift AI (RHOAI) Not affected rhoai/odh-llm-d-inference-scheduler-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-llm-d-kv-cache-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-mlflow-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-openvino-model-server-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-pipeline-runtime-datascience-cpu-py312-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-pipeline-runtime-pytorch-cuda-py312-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-pipeline-runtime-pytorch-llmcompressor-cuda-py312-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-pipeline-runtime-pytorch-rocm-py312-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-pipeline-runtime-tensorflow-cuda-py312-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-pipeline-runtime-tensorflow-rocm-py312-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-th06-cpu-torch210-py312-rhel9 Red Hat OpenShift AI (RHOAI) Not affected rhoai/odh-th06-cpu-torch291-py312-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-th06-cuda130-torch210-py312-rhel9 Red Hat OpenShift AI (RHOAI) Not affected rhoai/odh-th06-cuda130-torch291-py312-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-th06-rocm64-torch291-py312-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-training-cuda128-torch29-py312-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-training-rocm64-torch29-py312-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-trustyai-garak-lls-provider-dsp-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-trustyai-nemo-guardrails-server-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-vllm-gaudi-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-workbench-jupyter-datascience-cpu-py312-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-workbench-jupyter-pytorch-cuda-py312-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-workbench-jupyter-pytorch-llmcompressor-cuda-py312-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-workbench-jupyter-pytorch-rocm-py312-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-workbench-jupyter-tensorflow-cuda-py312-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-workbench-jupyter-tensorflow-rocm-py312-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-workbench-jupyter-trustyai-cpu-py312-rhel9 Red Hat Quay 3 Affected quay/quay-rhel9 Red Hat Satellite 6 Affected python3.12-pillow Red Hat Satellite 6 Affected python-pillow Red Hat Satellite 6 Under investigation satellite-capsule:el8/python-pillow Red Hat Satellite 6 Affected satellite:el8/python-pillow https://www.cve.org/CVERecord?id=CVE-2026-54060 https://nvd.nist.gov/vuln/detail/CVE-2026-54060 https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rst https://github.com/python-pillow/Pillow/commit/0a263e6264aa5399988d9acd3bbfbca2ca3ec77d https://github.com/python-pillow/Pillow/security/advisories/GHSA-5x94-69rx-g8h2