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Vulnerability record · CVE-2023-33466 · published 29 June 2023

CVE-2023-33466: Orthanc-server orthanc code injection vulnerability

Orthanc Server · Orthanc

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 attacker to overwrite the configuration, which can be exploited to trigger Remote Code Execution (RCE).

8.8 CVSS 3.1 High EPSS 4.2% · top 9.5% CWE-94 · Code injection
8.8CVSS 3.1 base score
4.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

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 attacker to overwrite the configuration, which can be exploited to trigger Remote Code Execution (RCE).

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://discourse.orthanc-server.org/t/security-advisory-for-orthanc-deployments-running-versions-before-1-12-0/3568 Issue TrackingVendor Advisory
https://lists.debian.org/debian-lts-announce/2023/09/msg00009.html
https://www.debian.org/security/2023/dsa-5473
https://discourse.orthanc-server.org/t/security-advisory-for-orthanc-deployments-running-versions-before-1-12-0/3568 Issue TrackingVendor Advisory
https://lists.debian.org/debian-lts-announce/2023/09/msg00009.html
https://www.debian.org/security/2023/dsa-5473

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-5442Orthanc-server orthanc out-of-bounds write vulnerabilityA heap buffer overflow vulnerability exists in the DICOM image decoder. Dimension fields are encoded using Value Representation (VR) Unsigned Long (U…EPSS 0.92%9.8CVE-2026-5443Orthanc-server orthanc out-of-bounds write vulnerabilityA heap buffer overflow vulnerability exists during the decoding of `PALETTE COLOR` DICOM images. Pixel length validation uses 32-bit multiplication f…EPSS 0.88%9.2CVE-2025-0896Orthanc-server orthanc missing authentication for critical function vulnerabilityOrthanc server prior to version 1.5.8 does not enable basic authentication by default when remote access is enabled. This could result in unauthorize…EPSS 2.5%9.1CVE-2026-5445Orthanc-server orthanc out-of-bounds read vulnerabilityAn out-of-bounds read vulnerability exists in the `DecodeLookupTable` function within `DicomImageDecoder.cpp`. The lookup-table decoding logic used f…EPSS 0.79%7.5CVE-2026-5440Orthanc-server orthanc allocation without limits vulnerabilityA memory exhaustion vulnerability exists in the HTTP server due to unbounded use of the `Content-Length` header. The server allocates memory directly…EPSS 0.94%7.5CVE-2026-5437Orthanc-server orthanc out-of-bounds read vulnerabilityAn out-of-bounds read vulnerability exists in `DicomStreamReader` during DICOM meta-header parsing. When processing malformed metadata structures, th…EPSS 0.76%7.5CVE-2026-5438Orthanc-server orthanc allocation without limits vulnerabilityA gzip decompression bomb vulnerability exists when Orthanc processes HTTP request with `Content-Encoding: gzip`. The server does not enforce limits …EPSS 0.76%7.5CVE-2026-5439Orthanc-server orthanc allocation without limits vulnerabilityA memory exhaustion vulnerability exists in ZIP archive processing. Orthanc automatically extracts ZIP archives uploaded to certain endpoints and tru…EPSS 0.76%

Source: NIST National Vulnerability Database (record CVE-2023-33466), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.