CVE-2026-112395 Pillow tiled-TIFF decoder reads past tile buffer in copy4 (Unpack.c:1290)
Attackers can cause heap over-reads or crashes in Pillow by supplying crafted tiled TIFF images, potentially exposing sensitive memory data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-112395?
CVE-2026-112395 is a medium-severity memory corruption 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. From 8.2.0 until 13.0.0, Pillow's tiled-TIFF decoder can read past the tile buffer while copying four-byte pixels. In _decodeTile, libtiff can return a tile allocation smaller than the required row stride multiplied by the tile length, and Pillow's stride-and-copy loop walks beyond that allocation. An attacker can supply a crafted tiled TIFF to an application that loads it. This can expose adjacent heap data in pixels or crash the process. This issue is fixed in version 13.0.0.
Weakness: CWE-122
Which versions are affected by CVE-2026-112395?
3 open source packages ship an affected version, including pillow. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
pillow Bitnami | From 8.2.0 | 13.0.0 |
pillow PyPI | From 8.2.0 | 13.0.0 |
pillow PyPI | From 8.2.0 | 13.0.0 |
Products include Python Pillow.
How do I fix CVE-2026-112395?
Upgrade pillow to 13.0.0 or later.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-112395 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-112395 exists.
Other vulnerabilities in Python Pillow
Sources
Also known as BIT-pillow-2026-112395, DEBIAN-CVE-2026-112395, ECHO-5c65-803c-60a0, GHSA-462x-pgg6-55fp, UBUNTU-CVE-2026-112395.