9.1 Critical
CVE-2026-5445
Out-of-Bounds Read in DicomImageDecoder (DecodeLookupTable)
OrthancDICOM Server
Status
- Not in CISA KEV
Exploit probabilityEPSSchecked 24 Oct
0.8%probability of exploitation in the next 30 days
Higher than 56% of scored CVEs
SeverityCVSS
9.1Critical
Description NVD
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.
Coverage 1 article · 1 outlet
- Nine Orthanc DICOM bugs riskSecurityWeek · first in our coverage · mentions it in passing