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Fencer Intel
critical 9.8

CVE-2026-112403 json

Pillow: Heap buffer overflow in ImagingJpegDecode

published 21d ago modified 11d ago also BIT-pillow-2026-112403 , EUVD-2026-104642 , GHSA-8g5g-8vmr-9782 , PYSEC-2026-4332

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 61%
public exploits
0
none known

Summary

Pillow is a Python imaging library. Prior to 13.0.0, Pillow's JPEG decoder can write a full-width scanline into a buffer sized for a requested draft scale. ImagingJpegDecode does not verify libjpeg's actual output width and component count after scaling is requested, and an 8-bit lossless SOF3 JPEG decoded by a build linked to libjpeg-turbo 3.x can ignore the requested downscaling geometry. An attacker can supply such a JPEG to an application that uses draft() or thumbnail() to request downscaling. This can corrupt heap memory, crash the process, or potentially allow code execution. Older libjpeg-turbo 2.x and IJG builds reject the SOF3 input. This issue is fixed in version 13.0.0.

Patch / fix

  • pypi pillow 13.0.0
  • bitnami pillow 13.0.0
  • python pillow 13.0.0
  • python-Pillow SLE Module for Package Hub 15 SP7 7.2.0-150300.3.33.1

suse advisories SUSE-SU-2026:5038-1

Is CVE-2026-112403 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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-2026-112403 updated cvss 8.1

pillow: Pillow: Heap buffer overflow in ImagingJpegDecode

  • Red Hat Exploit Intelligence exploit-intelligence/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-ocp-rag-rhel9, openshift-lightspeed/lightspeed-service-api-rhel9, openshift-lightspeed-tech-preview/lightspeed-rag-tool-rhel9 Red Hat AI Inference Server rhaii/vllm-tpu-rhel9, rhaii/vllm-neuron-rhel9, rhaii-fast/vllm-cpu-rhel9, rhaii-fast/vllm-tpu-rhel9, rhaii-fast/vllm-cuda-rhel9, rhaii-fast/vllm-rocm-rhel9, +5 more
    affected: no fix available
  • Red Hat Ansible Automation Platform 2 python3.12-pillow, ansible-automation-platform-26/hub-rhel9, ansible-automation-platform-27/hub-rhel9, ansible-automation-platform/automation-dashboard-rhel9, ansible-automation-platform-25/lightspeed-chatbot-rhel8, ansible-automation-platform-26/lightspeed-chatbot-rhel9, +1 more
    affected: no fix available “Fix deferred”
  • Red Hat Enterprise Linux 7 python-pillow, python-pillow-qt, python-pillow-tk, python-pillow-sane Red Hat Enterprise Linux AI (RHEL AI) 3 rhelai3/bootc-cuda-rhel9, rhelai3/bootc-rocm-rhel9, rhelai3/bootc-gaudi-rhel9, rhelai3/bootc-aws-cuda-rhel9, rhelai3/bootc-gcp-cuda-rhel9, rhelai3/disk-image-cuda-rhel9, +2 more Red Hat OpenShift AI (RHOAI) rhai/guidellm-rhel9, rhoai/odh-automl-rhel9, rhoai/odh-mlflow-rhel9, rhoai/odh-autorag-rhel9, rhoai/odh-ogx-core-rhel9, rhoai/odh-vllm-cuda-rhel9, +34 more
    affected: no fix available
  • Red Hat AI Inference Server 3.5 rhaii/vllm-cpu-rhel9 1793444554, rhaii/vllm-cuda-rhel9 1793444600, rhaii/vllm-rocm-rhel9 1793444456, rhaii/vllm-gaudi-rhel9 1793444510, rhaii/vllm-spyre-rhel9 1793444409, rhaii/model-opt-cuda-rhel9 1793444339
    fixed: vendor fix RHSA-2026:94715
  • Red Hat Satellite 6.16 for RHEL 8 python-pyyaml 6.0.1-1.el8pc, python-pillow 13.0.0-1.el8pc, python3.11-pyyaml 6.0.1-1.el8pc, python3.11-pillow 13.0.0-1.el8pc Red Hat Satellite 6.16 for RHEL 9 python-pyyaml 6.0.1-1.el9pc, python-pillow 13.0.0-1.el9pc, python3.11-pyyaml 6.0.1-1.el9pc, python3.11-pillow 13.0.0-1.el9pc
    fixed: vendor fix RHSA-2026:95655
  • Red Hat Satellite 6.17 for RHEL 9 python-pillow 13.0.0-1.el9pc, python3.11-pillow 13.0.0-1.el9pc
    fixed: vendor fix RHSA-2026:95656
  • Red Hat Satellite 6.18 for RHEL 9 python3.12-pillow 13.0.0-1.el9pc
    fixed: vendor fix RHSA-2026:95657
  • Red Hat Satellite 6.19 for RHEL 9 openvox-agent 8.31.1-1.el9sat, openvox-server 8.17.0-1.el9sat, python3.12-brotli 1.2.1-1.el9pc, python3.12-django 4.2.30-3.el9pc, python3.12-pillow 13.0.0-1.el9pc, python3.12-urllib3 2.8.0-1.el9pc, +3 more
    fixed: vendor fix RHSA-2026:92861
show 3 more
  • Red Hat Ansible Automation Platform 2 python-pillow, python3x-pillow, python3.11-pillow
    not affected: vulnerable code not in execute path
  • Red Hat Enterprise Linux 8 python-pillow, python3-pillow, python3-pillow-tk Red Hat OpenShift AI (RHOAI) rhoai/odh-vllm-gaudi-rhel9, rhoai/odh-kserve-agent-rhel9, rhoai/odh-kserve-router-rhel9, rhoai/odh-kserve-controller-rhel9, rhoai/odh-th06-cpu-torch291-py312-rhel9, rhoai/odh-th06-cuda130-torch291-py312-rhel9
    not affected: component not present
  • Red Hat Quay 3 quay/quay-rhel8, quay/quay-rhel9 Red Hat Satellite 6.16 for RHEL 8 python-nh3 0.3.0-2.el8pc, python-brotli 1.2.1-1.el8pc, python-django 4.2.30-2.el8pc, python-urllib3 2.8.0-1.el8pc, python3.11-nh3 0.3.0-2.el8pc, openvox-agent 8.32.0-1.el8sat, +10 more Red Hat Satellite 6.16 for RHEL 9 python-nh3 0.3.0-2.el9pc, python-brotli 1.2.1-1.el9pc, python-django 4.2.30-2.el9pc, python-urllib3 2.8.0-1.el9pc, python3.11-nh3 0.3.0-2.el9pc, openvox-agent 8.32.0-1.el9sat, +10 more Red Hat Satellite 6.17 for RHEL 9 python-brotli 1.2.1-1.el9pc, python-django 4.2.30-2.el9pc, python-urllib3 2.8.0-1.el9pc, openvox-agent 8.32.0-1.el9sat, openvox-server 8.18.0-1.el9sat, python-gitpython 3.2.1-1.el9pc, +6 more Red Hat Satellite 6.18 for RHEL 9 openvox-agent 8.32.0-1.el9sat, openvox-server 8.18.0-1.el9sat, python3.12-brotli 1.2.1-1.el9pc, python3.12-django 4.2.30-3.el9pc, python3.12-urllib3 2.8.0-1.el9pc, python3.12-gitpython 3.2.1-1.el9pc, +2 more
    not affected: vulnerable code not present

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
no
Technical impact
total
Assessed
18d ago

Exploit prediction

0.95% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/python-pillow/Pillow/security/advisories/GHSA-8g5g-8vmr-9782 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 9.2 CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA 4.0 9.2 CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
OSV 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
pypi pillow
<13.0.0
13.0.0
bitnami pillow
<13.0.0
13.0.0

Affected products

  • python-pillow Pillow

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

References

Sources

Fencer Intel 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.