Is CVE-2026-112405 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-112405 being exploited in the wild.

How severe is CVE-2026-112405?

High severity, with a CVSS score of 4, published 19 October 2026.

Which products and versions are affected?

pillow (PyPI) >= 12.0.0, < 13.0.0, ECOSYSTEM:introduced=12.0.0,fixed=13.0.0; Python Pillow Pillow 12.0.0 to 12.x.

Is there a fix for CVE-2026-112405?

Yes. pillow (PyPI): upgrade to 13.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-112405 attacked?

It is attacked with local access or over the network, in a software library.

Am I affected by CVE-2026-112405?

Check whether you run pillow (PyPI) or Python Pillow Pillow at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-112405: Pillow null pointer dereference in Image.merge()

Q: Is there a fix for CVE-2026-112405?

Yes. pillow (PyPI): upgrade to 13.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-112405 attacked?

It is attacked with local access or over the network, in a software library.

Q: Am I affected by CVE-2026-112405?

Check whether you run pillow (PyPI) or Python Pillow Pillow at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-112405 · Severity: high · CVSS 4 · Published 2026-10-19

Pillow is a Python image processing library used to open and manipulate image files. When processing certain crafted IPTC image files, Pillow's Image.merge() function can crash the Python process due to a null pointer dereference. Applications that automatically open untrusted image files are vulnerable to denial of service.

Technologies: pillow (PyPI), Python Pillow Pillow. Vendors: PyPI, Python Pillow.

Quick answers

Is CVE-2026-112405 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-112405 being exploited in the wild.
How severe is CVE-2026-112405?: High severity, with a CVSS score of 4, published 19 October 2026.
Which products and versions are affected?: pillow (PyPI) >= 12.0.0, < 13.0.0, ECOSYSTEM:introduced=12.0.0,fixed=13.0.0; Python Pillow Pillow 12.0.0 to 12.x.
Is there a fix for CVE-2026-112405?: Yes. pillow (PyPI): upgrade to 13.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-112405 attacked?: It is attacked with local access or over the network, in a software library.
Am I affected by CVE-2026-112405?: Check whether you run pillow (PyPI) or Python Pillow Pillow at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

pillow (PyPI): upgrade to 13.0.0 or later
```
pip install "pillow>=13.0.0"
```

Technical details

A validation bypass in Image.merge() skips checking the first input band, allowing 32-bit images backed by image32 storage to be merged as narrower multiband images, leading to null pointer dereference. The vulnerability affects versions 12.0.0 through 12.x; affected code can be reached either by parsing a crafted IPTC file or direct API calls to Image.merge(). This is a local denial-of-service issue fixed by raising ValueError on invalid merge operations in version 13.0.0.

Affected products

python-pillow Pillow 12.0.0 to 12.x

Identifiers

CVE-2026-112405
BIT-PILLOW-2026-112405
GHSA-cp9v-662q-vvx9
PYSEC-2026-4333

Timeline

2026-10-19: disclosed

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.