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Fencer Vulns
medium 6.5

CVE-2026-59198 json

Pillow TGA RLE encoder can serialize up to ~57 KB of adjacent heap data into generated images

published 2026-07-14 3 mo ago modified 2026-10-24 15 d ago also BIT-pillow-2026-59198 , EUVD-2026-43752 , GHSA-fj7v-r99m-22gq , PYSEC-2026-3494

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 24%
public exploits
0
none known

Summary

Pillow is a Python imaging library. From 5.2.0 until 12.3.0, Pillow's TGA RLE encoder reads past its packed row buffer when saving a mode 1 image with TGA RLE compression, allowing adjacent process heap bytes to be copied into the generated TGA file. 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-2026-59198

  • pillow Ubuntu 22.04 LTS 9.0.1-1ubuntu0.5
  • pillow Ubuntu 24.04 LTS 10.2.0-1ubuntu1.3
  • pillow Ubuntu 26.04 LTS 12.1.1-2ubuntu1.3
  • pillow Ubuntu Pro 20.04 LTS 7.0.0-4ubuntu0.9+esm1

ubuntu advisories UBUNTU-CVE-2026-59198

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

  • 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
  • python-Pillow openSUSE Tumbleweed 12.3.0-2.1

opensuse advisories openSUSE-SU-2026:21544-1openSUSE-SU-2026:11283-1

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-2026-59198 updated cvss 6.5

Pillow: Pillow: Information disclosure via TGA RLE encoder out-of-bounds read

  • 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-cpu-rhel9, rhaii/vllm-tpu-rhel9, rhaii/vllm-cuda-rhel9, rhaii/vllm-rocm-rhel9, rhaiis/vllm-cpu-rhel9, rhaiis/vllm-tpu-rhel9, +9 more 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) rhoai/odh-automl-rhel9, rhoai/odh-mlflow-rhel9, rhoai/odh-autorag-rhel9, rhoai/odh-caikit-nlp-rhel9, rhoai/odh-vllm-gaudi-rhel9, rhoai/odh-kserve-agent-rhel9, +32 more Red Hat Quay 3 quay/quay-rhel8, quay/quay-rhel9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Exploit Intelligence exploit-intelligence-tech-preview/vulnerability-analysis-rhel9 Red Hat Ansible Automation Platform 2 python-pillow 10.3.0-1.el9ap, 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 Red Hat Enterprise Linux 7 python-pillow, python-pillow-qt, python-pillow-tk, python-pillow-sane, python-pillow 10.3.0-1.el9ap Red Hat Enterprise Linux 8 python3-pillow, python3-pillow-tk, python-pillow 10.3.0-1.el9ap Red Hat Satellite 6 python-pillow 10.3.0-1.el9ap, python-pillow 12.2.0-1.el8pc
    under investigation

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
partial
Assessed
3 mo ago

Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/python-pillow/Pillow/security/advisories/GHSA-fj7v-r99m-22gq referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L
GitHub 3.1 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
OSV 3.1 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L

Affected packages

ecosystem package affected fixed in
pypi pillow
>=5.2.0, <12.3.0
12.3.0
bitnami pillow
>=5.2.0, <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.