CVE-2026-112392 Pillow: NULL dereference in ImagingExpand via rank filters on zero-size images

What is CVE-2026-112392?

CVE-2026-112392 is a high-severity vulnerability in Python Pillow, published on 19 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Pillow is a Python imaging library. Prior to 13.0.0, Pillow's rank-based filters can dereference invalid image storage for a zero-size image. ImagingExpand() allocates a non-empty output and then faults while replicating edges by reading the first pixel from empty input storage; ImagingRankFilter is never reached. An attacker can supply or cause creation of a zero-size image to an application that applies a rank, median, minimum, or maximum filter. This causes a native process crash. This issue is fixed in version 13.0.0.

Weakness: CWE-476

Which versions are affected by CVE-2026-112392?

4 open source packages ship an affected version, including pillow and Pillow. It affects 1 product.

Products include Python Pillow.

How do I fix CVE-2026-112392?

Upgrade pillow to 13.0.0 or later.

Is CVE-2026-112392 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-112392 exists.

Other vulnerabilities in Python Pillow

• CVE-2014-3007 Pillow command injection Critical 10.0
• CVE-2026-96639 Pillow multi-frame loaders can reuse stale native image storage after mode transitions Critical 9.8
• CVE-2022-30595 Buffer over-flow in Pillow Critical 9.8
• CVE-2021-25289 Out of bounds write in Pillow Critical 9.8
• CVE-2016-4009 Pillow Integer overflow in ImagingResampleHorizontal Critical 9.8

All Python Pillow vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-pillow-2026-112392, DEBIAN-CVE-2026-112392, ECHO-8e8c-c813-2f3f, GHSA-27h8-gf7j-v5hc, PYSEC-2026-4326, ROOT-APP-PYPI-CVE-2026-112392 and 1 more.