CVE-2026-112405
8.7HighPublished 19 Oct 2026 · NVD status: Received · AI triage by gemini-3.8-flash
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Impact
- High impact on availability
- Weakness
- CWE-476
Impact
Remote attackers can crash Python processes parsing user-supplied images via denial of service. They only need to supply a crafted IPTC file or feed specific image bands to an application calling Image.merge().
Root cause
Image.merge() skips validating the first input band, causing a null pointer dereference on the image8 plane when processing 32-bit images.
Affected systems
Pillow 12.0.0 through versions prior to 13.0.0
CVSS v4.0 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Fix & remediation
Upgrade Pillow to version 13.0.0 or later. No interim workaround is documented; prioritize updating the library.
$ pip install --upgrade 'pillow>=13.0.0'AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD 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.