CVE-2026-5445 Details
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.
A vulnerability allowing out-of-bounds read has been identified in the Orthanc DICOM Server's image decoding component, specifically within the 'DecodeLookupTable' function of 'DicomImageDecoder.cpp'. This vulnerability affects versions through 1.12.10. The issue arises when the lookup-table decoding logic for 'PALETTE COLOR' images fails to validate pixel indices against the size of the lookup table. As a result, crafted images with indices larger than the palette size can cause the decoder to read beyond the allocated memory for the lookup table, exposing heap contents in the output image.
Users are advised to upgrade to Orthanc DICOM Server version 1.12.11, which addresses this vulnerability. Consult the Orthanc documentation and release notes for guidance on patching and deployment.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 14, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://kb.cert.org/vuls/id/536588 | [email protected] | Third Party AdvisoryVDB Entry |
| https://www.machinespirits.de/ | [email protected] | Not Applicable |
| https://www.orthanc-server.com/ | [email protected] | Product |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-125 | Out-of-bounds Read | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| orthanc-server orthanc | < 1.12.11 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 14, 2026 | Initial Analysis | [email protected] |
| Apr 14, 2026 | CVE Modified | CISA-ADP |
| Apr 9, 2026 | New CVE Received | [email protected] |