Critical 9.2Published Oct 19, 2026

CVE-2026-112398Pillow: Heap buffer overflow in FlashPix (FPX) JPEG decoding leads to code execution

Updated under an hour ago (Oct 27, 2026, 8:50 PM ET)

Does this affect you?

It affects python-pillow Pillow and 1 other product. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.57%, higher than 47% of scored CVEs.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for python-pillow Pillow

Exploited in the last 30 days

Pillow is a Python imaging library. Prior to 13.0.0, Pillow's FlashPix JPEG-tile decoder can write decoded scanlines beyond the allocated tile buffer. FlashPix (FPX) JPEG decoding selects raw mode LA with two bytes per pixel, while an unrecognized JPEG mode can be decoded as JCS_UNKNOWN with four components, causing ImagingJpegDecode to write four-component scanlines into the two-byte tile buffer. An attacker can supply a crafted OLE2 FlashPix file to an application with the optional olefile dependency installed that opens or thumbnails untrusted input. This can corrupt heap memory and may allow arbitrary code execution. This issue is fixed in version 13.0.0.

CVSS: 9.2 CRITICAL (v4.0, CNA)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
Weakness (CWE): CWE-122, CWE-787
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.57% (percentile 47)
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Oct 22, 2026
First seen by InfoSec Signals: Oct 19, 2026

Affected products

Affected products

python-pillow Pillow python_pillow:pillow (from the name)	before 13.0.0	CNA record
python pillow python:pillow	before 13.0.0	NVD

References

References

https://github.com/python-pillow/Pillow/security/advisories/GHSA-5x8w-8jj5-q52h	x-refsource-confirm, exploit, vendor-advisory
https://github.com/python-pillow/Pillow/commit/242a059aedc1935097d9aa1dc3f099750467ba75	x-refsource-misc, patch
https://github.com/python-pillow/Pillow/releases/tag/13.0.0	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.