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CVE-2026-96778

8.8, high

Python-pillow Pillow Out-of-Bounds Write Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
8.8, high high CVSS v3.1
EPSS, next 30 days
0.5% higher than 42.8% of scored CVEs
Exploitation
No public evidence
Published
21 Oct 20267 days ago

Description

Pillow is a Python imaging library. From 9.4.0 until 13.0.0, ImagingJpegEncode() in src/libImaging/JpegEncode.c can call jpeg_write_marker() for a JPEG COM comment when an ICC profile has exactly filled the 65536-byte encoder buffer. libjpeg writes one byte before checking the exhausted free_in_buffer counter, which then wraps and permits the attacker-controlled comment and subsequent compressed image data to overwrite adjacent heap memory. Re-saving an untrusted image as JPEG while preserving its ICC profile and forwarded comment can crash the process and may enable code execution in suitable runtime and heap layouts. This issue is fixed in version 13.0.0.

Details

Vendor
Python-pillow
Product
Pillow
Weakness
CWE-787 (opens in a new tab)
Status
Modified
Updated
28 Oct 2026
Assigner
security-advisories@github.com

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References 4

Patches and fixes 2

Advisories 1

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Python-pillow CVEs

Every Python-pillow CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-96640 Python-pillow Pillow Uncontrolled Resource Consumption Vulnerability EPSS 0.5% 7.5, high
  • CVE-2026-96644 Python-pillow Pillow Out-of-Bounds Read Vulnerability EPSS 0.4% 8.1, high
  • CVE-2026-112390 Pillow is a Python imaging library EPSS 0.6% 7.5, high
  • CVE-2026-112391 Pillow is a Python imaging library EPSS 0.6% 7.5, high
  • CVE-2026-112393 Python-pillow Pillow Heap-based Buffer Overflow Vulnerability EPSS 1% 9.8, critical
  • CVE-2026-112394 Pillow is a Python imaging library EPSS 0.6% 8.2, high
  • CVE-2026-112395 Python-pillow Pillow Heap-based Buffer Overflow Vulnerability EPSS 0.5% 8.2, high
  • CVE-2026-112392 Python-pillow Pillow NULL Pointer Dereference Vulnerability EPSS 0.6% 7.5, high

Beyond this page

Is CVE-2026-96778 in your network?

This page tells you how dangerous CVE-2026-96778 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2026-96778 comes with the devices to patch.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 28 Oct 2026, not the live upstream state.