High severity · published Oct 19, 2026
CVE-2026-112405
Pillow: NULL pointer dereference in Image.merge via an unvalidated band 0
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
Pillow is a Python imaging library. From 12.0.0 until 13.0.0, Pillow's Image.merge() can dereference a null image8 plane. Validation skips the first input band, allowing a 32-bit integer or floating-point image backed by image32 storage to be merged as a narrower multiband image. A crafted IPTC file can reach this path when an application opens and loads it, or a caller can invoke Image.merge() directly with such a first band. This causes a native process crash. This issue is fixed in version 13.0.0.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PI
Pillow · python-pillow
>= 12.0.0, < 13.0.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-112405
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-112405
Patch
https://github.com/python-pillow/Pillow/commit/b6ee66e8b2c2c0932bdf65f963268d9f2927ef86
Release Notes
https://github.com/python-pillow/Pillow/releases/tag/13.0.0
Exploit
https://github.com/python-pillow/Pillow/security/advisories/GHSA-cp9v-662q-vvx9
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