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CVE-2026-112396

7.5, high

Python-pillow Pillow Use-After-Free Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7.5, high high CVSS v3.1
EPSS, next 30 days
0.6% higher than 47.8% of scored CVEs
Exploitation
Exploit code published
Published
19 Oct 20268 days ago

Description

Pillow is a Python imaging library. From 11.3.0 until 13.0.0, Pillow has a heap use-after-free when libtiff rejects a tag while encoding TIFF data to an in-memory buffer. When an application saves attacker-influenced TIFF tags to BytesIO, libtiff can reject a tag during encoding in ImagingLibTiffEncode; the error path then frees the output buffer without closing or clearing the TIFF handle, and later cleanup flushes through the write callback into freed memory, which can crash the process and may enable code execution. This issue is fixed in version 13.0.0.

Details

Vendor
Python-pillow
Product
Pillow
Weakness
CWE-416 (opens in a new tab)
Status
Analyzed
Updated
26 Oct 2026
Assigner
security-advisories@github.com

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

References 3

Exploit code 1

Patches and fixes 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-2026-112390 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 0.8% 9.8, critical
  • CVE-2026-112394 Pillow is a Python imaging library EPSS 0.5% 8.2, high
  • CVE-2026-112395 Python-pillow Pillow Heap-based Buffer Overflow Vulnerability EPSS 0.4% 8.2, high
  • CVE-2026-112392 Python-pillow Pillow NULL Pointer Dereference Vulnerability EPSS 0.5% 7.5, high

Beyond this page

Is CVE-2026-112396 in your network?

This page tells you how dangerous CVE-2026-112396 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.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

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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 27 Oct 2026, not the live upstream state.