CVE-2026-5444

A heap buffer overflow vulnerability exists in the PAM image parsing logic. When Orthanc processes a crafted PAM image embedded in a DICOM file, image dimensions are multiplied using 32-bit unsigned arithmetic. Specially chosen values can cause an integer overflow during buffer size calculation, resulting in the allocation of a small buffer followed by a much larger write operation during pixel processing.

CVSS 3.1

7.1CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

EPSS

0.2% chance of exploitation in the next 30 days; higher than 5% of CVEs (scores of 2026-10-25)

CWE

CWE-787

Published

2026-04-09

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• orthanc-server:orthanc

References

• https://kb.cert.org/vuls/id/536588
• https://www.machinespirits.de/
• https://www.orthanc-server.com/

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