CVE-2026-5445

Out-of-Bounds Read in DicomImageDecoder (DecodeLookupTable)

Critical · published April 9, 2026

CVSS v3.1
9.1
EPSS
1%
Percentile
55.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00788 · 55.7th percentile
Published
2026-04-09T14:42Z
EPSS history
Timeline
  • 09 APR 14:42Z
    Out-of-Bounds Read in DicomImageDecoder (DecodeLookupTable)
    cvelistv5