PT-2026-31633 · Orthanc · Orthanc

Published 2026-04-09 · Updated 2026-04-09 · CVE-2026-5444

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Orthanc (affected versions not specified)

Description A heap buffer overflow 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.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-5444

Affected Products

Orthanc

References · 11

• https://security-tracker.debian.org/tracker/CVE-2026-5444 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-5444 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-5444 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-5444 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-5444 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-5444 · Security Note
• https://twitter.com/CVEnew/status/2042302825691300184 · Twitter Post
• https://kb.cert.org/vuls/id/536588 · Note
• https://twitter.com/VulmonFeeds/status/2042331375693447308 · Twitter Post
• https://orthanc-server.com · Note
• https://machinespirits.de · Note