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CVE-2026-96778 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:8.8 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/python-pillow/Pillow/security/advisories/GHSA-g7cr-3p24-7wf7	CISA-ADP	Vendor Advisory
https://github.com/python-pillow/Pillow/commit/02561b8dc6117d5670d4b469fecdd02c70854f9b	[email protected]	Patch
https://github.com/python-pillow/Pillow/pull/10124	[email protected]	Issue Tracking
https://github.com/python-pillow/Pillow/releases/tag/13.0.0	[email protected]	Release Notes
https://github.com/python-pillow/Pillow/security/advisories/GHSA-g7cr-3p24-7wf7	[email protected]	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-787	Out-of-bounds Write	[email protected]

Affected Products

Product	Versions
python pillow	>= 9.4.0, < 13.0.0
CPE cpe:2.3:a:python:pillow:::::::: Remediation No remediation found in references.

Change History

3 change records found show changes

Date	Action	Recorded By
Oct 28, 2026	CVE Modified	CISA-ADP
Oct 27, 2026	Initial Analysis	[email protected]
Oct 21, 2026	New CVE Received	[email protected]