CVE-2026-5442
Heap Buffer Overflow in DICOM Image Decoder via VR UL Dimensions
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
A heap buffer overflow vulnerability exists in the DICOM image decoder. Dimension fields are encoded using Value Representation (VR) Unsigned Long (UL), instead of the expected VR Unsigned Short (US), which allows extremely large dimensions to be processed. This causes an integer overflow during frame size calculation and results in out-of-bounds memory access during image decoding.
| Vendor | orthanc |
| Product | dicom server |
| Published | Apr 9, 2026 |
| Last Updated | Apr 14, 2026 |
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Affected Versions
Orthanc / DICOM Server
0 ≤ 1.12.10