Orthanc
Vendor:
First CVE: Jun 29, 2023 · Active for 3 years
13
Total CVEs
More Total CVEs than 92% of tracked products
3.3
Avg CVEs / Year
Higher CVE frequency than 84% of tracked products
7.9
Avg CVSS
Higher Avg CVSS than 70% of tracked products
0.0%
KEV Rate
Bottom 1%
Trends Over Time
The number and severity of CVEs published that impact Orthanc over time
Volume of CVEsAvg CVSS Base Score
First CVE
Jun 29, 2023
3 years ago
Most Recent CVE
Apr 9, 2026
110 days ago
CVE Severity & Scoring
Orthanc13 CVEs
15%
54%
31%
All CVEs353,173 CVEs
45%
40%
11%
MediumHighCritical
Attack Vector
Local2 (15.4%)
Network11 (84.6%)
Unknown0 (0.0%)
Physical0 (0.0%)
Adjacent Network0 (0.0%)
Attack Complexity
Low13 (100.0%)
High0 (0.0%)
Unknown0 (0.0%)
User Interaction
None9 (69.2%)
Unknown0 (0.0%)
Required3 (23.1%)
Privileges Required
Low2 (15.4%)
High0 (0.0%)
None11 (84.6%)
Unknown0 (0.0%)
Top CVEs
Signals from CVEs in this product scope (13 CVEs).
13 CVEs · Highest risk first
| CVE | Published | CVSS | Risk | KEV | Exploit |
|---|---|---|---|---|---|
CVE-2026-5443CRITICAL 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 calculation | Apr 9, 2026 | 9.8 | 31 | NO | NO |
CVE-2026-5442CRITICAL 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 | Apr 9, 2026 | 9.8 | 31 | NO | NO |
CVE-2026-5445CRITICAL 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 | Apr 9, 2026 | 9.1 | 30 | NO | NO |
CVE-2023-33466HIGH Orthanc before 1.12.0 allows authenticated users with access to the Orthanc API to overwrite arbitrary files on the file system, and in specific deployment scenarios allows the att | Jun 29, 2023 | 8.8 | 30 | NO | NO |
CVE-2025-0896CRITICAL Orthanc server prior to version 1.5.8 does not enable basic authentication by default when remote access is enabled. This could result in unauthorized access by an attacker. | Feb 13, 2025 | 9.8 | 28 | NO | NO |
CVE-2026-5437HIGH An out-of-bounds read vulnerability exists in `DicomStreamReader` during DICOM meta-header parsing. When processing malformed metadata structures, the parser may read beyond the bo | Apr 9, 2026 | 7.5 | 26 | NO | NO |
CVE-2026-5440HIGH A memory exhaustion vulnerability exists in the HTTP server due to unbounded use of the `Content-Length` header. The server allocates memory directly based on the attacker supplie | Apr 9, 2026 | 7.5 | 25 | NO | NO |
CVE-2026-5439HIGH A memory exhaustion vulnerability exists in ZIP archive processing. Orthanc automatically extracts ZIP archives uploaded to certain endpoints and trusts metadata fields describing | Apr 9, 2026 | 7.5 | 25 | NO | NO |
CVE-2026-5438HIGH A gzip decompression bomb vulnerability exists when Orthanc processes HTTP request with `Content-Encoding: gzip`. The server does not enforce limits on decompressed size and alloca | Apr 9, 2026 | 7.5 | 25 | NO | NO |
CVE-2026-5444HIGH A heap buffer overflow vulnerability exists in the PAM image parsing logic. When Orthanc processes a crafted PAM image embedded in a DICOM file, image dimensions are multiplied usi | Apr 9, 2026 | 7.1 | 24 | NO | NO |
Exploit Exposure
Signals from CVEs in this product scope (13 CVEs).
CISA KEV
0 CVEs
0.0% of CVEs· Bottom 1%
Metasploit
0 CVEs
0.0% of CVEs· Bottom 1%
Nuclei
0 CVEs
0.0% of CVEs· Bottom 1%
ExploitDB
0 CVEs
0.0% of CVEs· Bottom 1%
Social Chatter
Signals from CVEs in this product scope (13 CVEs).
Media Mentions
Signals from CVEs in this product scope (13 CVEs).
Top CNAs Publishing CVEs For Orthanc
Top CWEs
Versions
No cataloged versions.