CVE-2026-5443

Name: CVE-2026-5443
Creator: NVD / NIST
Published: 2026-04-09T15:16:16.653+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.57%

Last modified Jun 17, 2026

CVE-2026-5443 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 0.57% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

0.57%

42.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Orthanc-Server	Orthanc	< 1.12.11

References

https://kb.cert.org/vuls/id/536588Third Party Advisory, VDB Entry
https://www.machinespirits.de/Not Applicable
https://www.orthanc-server.com/Product

Timeline

Published: Apr 9, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-5443?

How severe is CVE-2026-5443?

CVE-2026-5443 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.57% probability of exploitation in the next 30 days.

How do I fix CVE-2026-5443?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-5443?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST