CVE-2026-5443: CWE-190 Integer Overflow or Wraparound in Orthanc DICOM Server
CVE-2026-5443 is a heap buffer overflow vulnerability in the Orthanc DICOM Server affecting the decoding of PALETTE COLOR DICOM images. The vulnerability arises because pixel length validation uses 32-bit multiplication for width and height, which can overflow and cause the validation to incorrectly succeed. This allows the decoder to read and write beyond allocated memory buffers. There is no CVSS score or official vendor remediation information currently available. No known exploits in the wild have been reported.
AI Analysis
Technical Summary
This vulnerability involves an integer overflow (CWE-190) during the decoding process of PALETTE COLOR DICOM images in the Orthanc DICOM Server. The multiplication of width and height values for pixel length validation uses 32-bit arithmetic, which can overflow and bypass validation checks. This leads to a heap buffer overflow, enabling out-of-bounds memory access during image decoding. The issue affects version 0 of the product, with no patch or official remediation level published yet. The vendor advisory from CERT is available but does not specify a fix or mitigation.
Potential Impact
Successful exploitation could result in a heap buffer overflow, potentially allowing an attacker to cause a denial of service or execute arbitrary code within the context of the Orthanc DICOM Server process. However, no known exploits have been reported, and the exact impact depends on exploitation feasibility and environment.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory at https://kb.cert.org/vuls/id/536588 for current remediation guidance. Until an official fix is released, cautious handling of untrusted PALETTE COLOR DICOM images is advised. No vendor-provided mitigation or temporary fix is currently documented.
CVE-2026-5443: CWE-190 Integer Overflow or Wraparound in Orthanc DICOM Server
Description
CVE-2026-5443 is a heap buffer overflow vulnerability in the Orthanc DICOM Server affecting the decoding of PALETTE COLOR DICOM images. The vulnerability arises because pixel length validation uses 32-bit multiplication for width and height, which can overflow and cause the validation to incorrectly succeed. This allows the decoder to read and write beyond allocated memory buffers. There is no CVSS score or official vendor remediation information currently available. No known exploits in the wild have been reported.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an integer overflow (CWE-190) during the decoding process of PALETTE COLOR DICOM images in the Orthanc DICOM Server. The multiplication of width and height values for pixel length validation uses 32-bit arithmetic, which can overflow and bypass validation checks. This leads to a heap buffer overflow, enabling out-of-bounds memory access during image decoding. The issue affects version 0 of the product, with no patch or official remediation level published yet. The vendor advisory from CERT is available but does not specify a fix or mitigation.
Potential Impact
Successful exploitation could result in a heap buffer overflow, potentially allowing an attacker to cause a denial of service or execute arbitrary code within the context of the Orthanc DICOM Server process. However, no known exploits have been reported, and the exact impact depends on exploitation feasibility and environment.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory at https://kb.cert.org/vuls/id/536588 for current remediation guidance. Until an official fix is released, cautious handling of untrusted PALETTE COLOR DICOM images is advised. No vendor-provided mitigation or temporary fix is currently documented.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- certcc
- Date Reserved
- 2026-04-02T19:23:06.757Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://kb.cert.org/vuls/id/536588","vendor":"CERT"}]
Threat ID: 69d7bcce1cc7ad14dad7b6fa
Added to database: 4/9/2026, 2:50:54 PM
Last enriched: 4/9/2026, 3:05:59 PM
Last updated: 4/9/2026, 4:13:08 PM
Views: 5
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.