# Orthanc-Server vulnerabilities

Source: https://junglewise.ai/threats/vendors/orthanc-server  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/vendors/orthanc-server.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 9 vulnerabilities in Orthanc-Server: 0 in the last 7 days and 0 in the last 90 days, 3 of them critical and 0 exploited in the wild. The most recent, CVE-2026-5445, was published on 9 April 2026. 1 technology has a page of its own.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 9 (3 critical, 0 exploited in the wild)

## About Orthanc-Server

Orthanc is an open-source DICOM server and medical imaging platform.

## Latest Orthanc-Server vulnerabilities

- [CVE-2026-5445: An out-of-bounds read vulnerability exists in the `DecodeLookupTable` function within `DicomImageDecoder.cpp`. The…](https://junglewise.ai/threats/cve-2026-5445-an-out-of-bounds-read-vulnerability-exists-in-the) (critical, CVSS 9.1, published 9 Apr 2026)
- [CVE-2026-5444: A heap buffer overflow vulnerability exists in the PAM image parsing logic. When Orthanc processes a crafted PAM image…](https://junglewise.ai/threats/cve-2026-5444-a-heap-buffer-overflow-vulnerability-exists-in-the-pam-image) (high, CVSS 7.1, published 9 Apr 2026)
- [CVE-2026-5443: A heap buffer overflow vulnerability exists during the decoding of `PALETTE COLOR` DICOM images. Pixel length…](https://junglewise.ai/threats/cve-2026-5443-a-heap-buffer-overflow-vulnerability-exists-during-the-decoding-of) (critical, CVSS 9.8, published 9 Apr 2026)
- [CVE-2026-5442: A heap buffer overflow vulnerability exists in the DICOM image decoder. Dimension fields are encoded using Value…](https://junglewise.ai/threats/cve-2026-5442-a-heap-buffer-overflow-vulnerability-exists-in-the-dicom-image) (critical, CVSS 9.8, published 9 Apr 2026)
- [CVE-2026-5441: An out-of-bounds read vulnerability exists in the `DecodePsmctRle1` function of `DicomImageDecoder.cpp`. The…](https://junglewise.ai/threats/cve-2026-5441-an-out-of-bounds-read-vulnerability-exists-in-the-decodepsmctrle1) (high, CVSS 7.1, published 9 Apr 2026)
- [CVE-2026-5440: A memory exhaustion vulnerability exists in the HTTP server due to unbounded use of the `Content-Length` header. The…](https://junglewise.ai/threats/cve-2026-5440-a-memory-exhaustion-vulnerability-exists-in-the-http-server-due-to) (high, CVSS 7.5, published 9 Apr 2026)
- [CVE-2026-5439: A memory exhaustion vulnerability exists in ZIP archive processing. Orthanc automatically extracts ZIP archives…](https://junglewise.ai/threats/cve-2026-5439-a-memory-exhaustion-vulnerability-exists-in-zip-archive-processing) (high, CVSS 7.5, published 9 Apr 2026)
- [CVE-2026-5438: A gzip decompression bomb vulnerability exists when Orthanc processes HTTP request with `Content-Encoding: gzip`. The…](https://junglewise.ai/threats/cve-2026-5438-a-gzip-decompression-bomb-vulnerability-exists-when-orthanc) (high, CVSS 7.5, published 9 Apr 2026)
- [CVE-2026-5437: An out-of-bounds read vulnerability exists in `DicomStreamReader` during DICOM meta-header parsing. When processing…](https://junglewise.ai/threats/cve-2026-5437-an-out-of-bounds-read-vulnerability-exists-in-dicomstreamreader) (high, CVSS 7.5, published 9 Apr 2026)

## Most severe Orthanc-Server vulnerabilities

- [CVE-2026-5442: A heap buffer overflow vulnerability exists in the DICOM image decoder. Dimension fields are encoded using Value…](https://junglewise.ai/threats/cve-2026-5442-a-heap-buffer-overflow-vulnerability-exists-in-the-dicom-image) (critical, CVSS 9.8, published 9 Apr 2026)
- [CVE-2026-5443: A heap buffer overflow vulnerability exists during the decoding of `PALETTE COLOR` DICOM images. Pixel length…](https://junglewise.ai/threats/cve-2026-5443-a-heap-buffer-overflow-vulnerability-exists-during-the-decoding-of) (critical, CVSS 9.8, published 9 Apr 2026)
- [CVE-2026-5445: An out-of-bounds read vulnerability exists in the `DecodeLookupTable` function within `DicomImageDecoder.cpp`. The…](https://junglewise.ai/threats/cve-2026-5445-an-out-of-bounds-read-vulnerability-exists-in-the) (critical, CVSS 9.1, published 9 Apr 2026)
- [CVE-2026-5437: An out-of-bounds read vulnerability exists in `DicomStreamReader` during DICOM meta-header parsing. When processing…](https://junglewise.ai/threats/cve-2026-5437-an-out-of-bounds-read-vulnerability-exists-in-dicomstreamreader) (high, CVSS 7.5, published 9 Apr 2026)
- [CVE-2026-5440: A memory exhaustion vulnerability exists in the HTTP server due to unbounded use of the `Content-Length` header. The…](https://junglewise.ai/threats/cve-2026-5440-a-memory-exhaustion-vulnerability-exists-in-the-http-server-due-to) (high, CVSS 7.5, published 9 Apr 2026)
- [CVE-2026-5438: A gzip decompression bomb vulnerability exists when Orthanc processes HTTP request with `Content-Encoding: gzip`. The…](https://junglewise.ai/threats/cve-2026-5438-a-gzip-decompression-bomb-vulnerability-exists-when-orthanc) (high, CVSS 7.5, published 9 Apr 2026)
- [CVE-2026-5439: A memory exhaustion vulnerability exists in ZIP archive processing. Orthanc automatically extracts ZIP archives…](https://junglewise.ai/threats/cve-2026-5439-a-memory-exhaustion-vulnerability-exists-in-zip-archive-processing) (high, CVSS 7.5, published 9 Apr 2026)
- [CVE-2026-5444: A heap buffer overflow vulnerability exists in the PAM image parsing logic. When Orthanc processes a crafted PAM image…](https://junglewise.ai/threats/cve-2026-5444-a-heap-buffer-overflow-vulnerability-exists-in-the-pam-image) (high, CVSS 7.1, published 9 Apr 2026)
- [CVE-2026-5441: An out-of-bounds read vulnerability exists in the `DecodePsmctRle1` function of `DicomImageDecoder.cpp`. The…](https://junglewise.ai/threats/cve-2026-5441-an-out-of-bounds-read-vulnerability-exists-in-the-decodepsmctrle1) (high, CVSS 7.1, published 9 Apr 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Orthanc-Server technologies

- [Orthanc-Server Orthanc](https://junglewise.ai/threats/technologies/orthanc-server-orthanc): 9 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Orthanc-Server vulnerabilities", https://junglewise.ai/threats/vendors/orthanc-server, 9 November 2026.