CVE-2026-5445
Out-of-Bounds Read in DicomImageDecoder (DecodeLookupTable)
- State
- Published
- Severity
- 9.1 Critical
- Published
- Apr 9, 2026
- Updated
- Apr 14, 2026
- Reserved
- Apr 2, 2026
Description
An out-of-bounds read vulnerability exists in the `DecodeLookupTable` function within `DicomImageDecoder.cpp`. The lookup-table decoding logic used for `PALETTE COLOR` images does not validate pixel indices against the lookup table size. Crafted images containing indices larger than the palette size cause the decoder to read beyond allocated lookup table memory and expose heap contents in the output image.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.1 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H | CISA-ADP |
Weaknesses
The record names no weakness.
Affected Products
| Product | Versions |
|---|---|
DICOM ServerOrthanc |
|
References
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