CVE-2026-5445

Name: CVE-2026-5445
Creator: NVD / NIST
Published: 2026-04-09T15:16:16.863+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 0.67%

Last modified Jun 17, 2026

CVE-2026-5445 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. An out-of-bounds read vulnerability exists in the `DecodeLookupTable` function within `DicomImageDecoder.cpp`. The lookup-table decoding logic used for `PALETTE COLOR` images does not validate pixel indices against the lookup table size. EPSS estimates a 0.67% chance of exploitation in the next 30 days.

Description

An out-of-bounds read vulnerability exists in the `DecodeLookupTable` function within `DicomImageDecoder.cpp`. The lookup-table decoding logic used for `PALETTE COLOR` images does not validate pixel indices against the lookup table size. Crafted images containing indices larger than the palette size cause the decoder to read beyond allocated lookup table memory and expose heap contents in the output image.

Metrics

CVSS 3.1

9.1/10

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

EPSS Probability

0.67%

47.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

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-2026-5445?

How severe is CVE-2026-5445?

CVE-2026-5445 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 0.67% probability of exploitation in the next 30 days.

How do I fix CVE-2026-5445?

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-2026-5445?

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

Scan your code now

Source: NVD / NIST