Out-of-bounds read in Orthanc - CVE-2026-5445
Published: April 9, 2026
Vulnerability identifier: #VU125676
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-5445
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Orthanc
Affected software:
Orthanc
Orthanc
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to out-of-bounds read in the DecodeLookupTable function within DicomImageDecoder.cpp when decoding lookup tables for PALETTE COLOR images. A remote attacker can supply a crafted image containing pixel indices larger than the palette size to disclose sensitive information.
Heap contents may be exposed in the output image.
How to mitigate CVE-2026-5445
Install security update from vendor's website.