---
title: "CVE-2026-112403: Pillow - Heap Corruption & Remote Code Execution"
description: "Pillow < 13.0.0 contains a heap corruption vulnerability caused by improper verification of JPEG decoder output width and component count when using draft scaling, letting attackers supply crafted JPEGs to cause crashes or code execution, exploit requires processing crafted JPEG images."
url: https://panop.io/threat-heartbeat/CVE-2026-112403/
---

# CVE-2026-112403 Pillow - Heap Corruption & Remote Code Execution

Pillow < 13.0.0 contains a heap corruption vulnerability caused by improper verification of JPEG decoder output width and component count when using draft scaling, letting attackers supply crafted JPEGs to cause crashes or code execution, exploit requires processing crafted JPEG images.

CVSS base score 9.2 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-112403)

## Details

Type

Heap Corruption

Impact

Remote Code Execution, Denial Of Service

CVSS vector

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

Published

19 October 2026

Updated

20 October 2026

Weakness

[CWE-122](https://cwe.mitre.org/data/definitions/122.html)

## Vendor fix

Upgrade to version 13.0.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-112403](https://nvd.nist.gov/vuln/detail/CVE-2026-112403)
- [https://github.com/python-pillow/Pillow/commit/242a059aedc1935097d9aa1dc3f099750467ba75](https://github.com/python-pillow/Pillow/commit/242a059aedc1935097d9aa1dc3f099750467ba75)
- [https://github.com/python-pillow/Pillow/releases/tag/13.0.0](https://github.com/python-pillow/Pillow/releases/tag/13.0.0)
- [https://github.com/python-pillow/Pillow/security/advisories/GHSA-8g5g-8vmr-9782](https://github.com/python-pillow/Pillow/security/advisories/GHSA-8g5g-8vmr-9782)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)