CVE-2026-5442

critical · 9.8

A heap buffer overflow vulnerability exists in the DICOM image decoder. Dimension fields are encoded using Value Representation (VR) Unsigned Long (UL), instead of the expected VR Unsigned Short (US), which allows extremely large dimensions to be processed. This causes an integer overflow during frame size calculation and results in out-of-bounds memory access during image decoding.

9.8

CVSS

0.6%

EPSS (exploit prob.)

47th

EPSS percentile

2026-04-09

Published

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

Weaknesses

CWE-787

Affected products

Vendor	Product	Affected versions
orthanc-server	orthanc	< 1.12.11

Check a specific version with /api/v1/cve/match.

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-5442