CVE-2026-5443: A heap buffer overflow vulnerability exists during the decoding of `PALETTE COLOR` DICOM images. Pixel length…
CVE-2026-5443 · Severity: critical · CVSS 9.8 · Published 2026-04-09
A heap buffer overflow vulnerability exists during the decoding of `PALETTE COLOR` DICOM images. Pixel length validation uses 32-bit multiplication for width and height calculations. If these values overflow, the validation check incorrectly succeeds, allowing the decoder to read and write to memory beyond allocated buffers.
No. Junglewise Threat Intelligence has no report of CVE-2026-5443 being exploited in the wild.
How severe is CVE-2026-5443?
Critical severity, with a CVSS score of 9.8, 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-2026-5443?
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-2026-5443?
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.