CVE-2026-5443: A heap buffer overflow vulnerability exists during the decoding of `PALETTE COLOR` DICOM images. Pixel length validation uses 32-bit multiplication for width…

PriorityP357critical9.8CVSS 3.1

AVNACLPRNUINSUCHIHAH

EPSS

0.57%

42.9th percentile

A heap buffer overflow vulnerability exists during the decoding of `PALETTE COLOR` DICOM images. Pixel length validation uses 32-bit multiplication for width and height calculations. If these values overflow, the validation check incorrectly succeeds, allowing the decoder to read and write to memory beyond allocated buffers.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
debian	orthanc	—	—
orthanc-server	orthanc	< 1.12.11	1.12.11
orthanc	dicom_server	<= 1.12.10	—

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