CVE-2026-5445Out-of-Bounds Read in DicomImageDecoder (DecodeLookupTable)
Updated under an hour ago ()
Does this affect you?
It affects Orthanc DICOM Server and 1 other product. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.79%, higher than 55% of scored CVEs.
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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.
- CVSS
- 9.1 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- Weakness (CWE)
- CWE-125
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.79% (percentile 55)
- Assigned by
- certcc
- NVD analysis
- Analyzed
- Record last updated
- Apr 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Orthanc DICOM Server orthanc:dicom_server (from the name) | through 1.12.10 | CNA record |
orthanc-server orthanc orthanc-server:orthanc | before 1.12.11 | NVD |
References
- https://www.orthanc-server.com/product
- https://www.machinespirits.de/not-applicable
- https://kb.cert.org/vuls/id/536588third-party-advisory, vdb-entry
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.