CVE-2026-5443: Heap Buffer Overflow in DICOM Image Decoder (Palette Color Decode)
Published Apr 9, 2026
·Updated
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 Software
1 affected component
Orthanc-server Orthanc<1.12.11
Event History
Apr 9, 2026
CVE Published
via MITRE·02:43 PM
Data Sourced
via MITRE·02:43 PM
DescriptionWeakness
Data Sourced
via NVD·03:16 PM
DescriptionSeverityWeaknessAffected Software
Jun 24, 58257
Event
via FIRST·10:52 PM
Frequently Asked Questions
1
What is the severity of CVE-2026-5443?
The severity of CVE-2026-5443 is rated as critical with a CVSS score of 9.8.
2
How do I fix CVE-2026-5443?
To fix CVE-2026-5443, update to the latest version of the Orthanc server that addresses this vulnerability.
3
What type of vulnerability is CVE-2026-5443?
CVE-2026-5443 is classified as a heap buffer overflow vulnerability.
4
What software is affected by CVE-2026-5443?
CVE-2026-5443 affects the Orthanc server software.
5
When was CVE-2026-5443 published?
CVE-2026-5443 was published on April 9, 2026.