# CVE-2026-5445: An out-of-bounds read vulnerability exists in the `DecodeLookupTable` function within `DicomImageDecoder.cpp`. The…

Source: https://junglewise.ai/threats/cve-2026-5445-an-out-of-bounds-read-vulnerability-exists-in-the  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-09  
License: CC BY 4.0 with a link back

CVE-2026-5445 · Severity: critical · CVSS 9.1 · Published 2026-04-09

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.

Technologies: [Orthanc-Server Orthanc](https://junglewise.ai/threats/technologies/orthanc-server-orthanc). Vendors: [Orthanc-Server](https://junglewise.ai/threats/vendors/orthanc-server).

## Quick answers

**Is CVE-2026-5445 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-5445 being exploited in the wild.

**How severe is CVE-2026-5445?** Critical severity, with a CVSS score of 9.1, published 9 April 2026.

**Which products and versions are affected?** Orthanc-Server Orthanc. The advisory does not name versions.

**Is there a fix for CVE-2026-5445?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2026-5445?** Check whether you run Orthanc-Server Orthanc. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Orthanc-Server Orthanc

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