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orthanc-server / orthanc CVEs

Beta · best-effort

12 CVEs tagged to orthanc-server / orthanc4 Critical, 7 High, 1 Medium, 0 Low, 0 Unrated.

CVE-2026-5445

Published Apr 9, 2026

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…

CVSS 9.1 · Critical
evidence mentions
4
Buzz score
36.1
Vendor/product tagsBeta · best-effort

CVE-2026-5444

Published Apr 9, 2026

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 us…

CVSS 7.1 · High
evidence mentions
3
Buzz score
28.9
Vendor/product tagsBeta · best-effort

CVE-2026-5443

Published Apr 9, 2026

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 calculatio…

CVSS 9.8 · Critical
evidence mentions
3
Buzz score
28.9
Vendor/product tagsBeta · best-effort

CVE-2026-5442

Published Apr 9, 2026

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…

CVSS 9.8 · Critical
evidence mentions
3
Buzz score
28.9
Vendor/product tagsBeta · best-effort

CVE-2026-5441

Published Apr 9, 2026

An out-of-bounds read vulnerability exists in the `DecodePsmctRle1` function of `DicomImageDecoder.cpp`. The `PMSCT_RLE1` decompression routine, which decodes the proprietary Phil…

CVSS 7.1 · High
evidence mentions
3
Buzz score
28.9
Vendor/product tagsBeta · best-effort

CVE-2026-5440

Published Apr 9, 2026

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 suppli…

CVSS 7.5 · High
evidence mentions
3
Buzz score
28.9
Vendor/product tagsBeta · best-effort

CVE-2026-5439

Published Apr 9, 2026

A memory exhaustion vulnerability exists in ZIP archive processing. Orthanc automatically extracts ZIP archives uploaded to certain endpoints and trusts metadata fields describing…

CVSS 7.5 · High
evidence mentions
3
Buzz score
28.9
Vendor/product tagsBeta · best-effort

CVE-2026-5438

Published Apr 9, 2026

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 alloc…

CVSS 7.5 · High
evidence mentions
3
Buzz score
28.9
Vendor/product tagsBeta · best-effort

CVE-2026-5437

Published Apr 9, 2026

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 b…

CVSS 7.5 · High
evidence mentions
4
Buzz score
36.1
Vendor/product tagsBeta · best-effort

CVE-2025-0896

Published Feb 13, 2025

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.

CVSS 9.2 · Critical
evidence mentions
2
Buzz score
21.0
Vendor/product tagsBeta · best-effort

CVE-2024-22725

Published Jan 24, 2024

Orthanc versions before 1.12.2 are affected by a reflected cross-site scripting (XSS) vulnerability. The vulnerability was present in the server's error reporting.

CVSS 6.1 · Medium
Vendor/product tagsBeta · best-effort

CVE-2023-33466

Published Jun 29, 2023

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 at…

CVSS 8.8 · High
Vendor/product tagsBeta · best-effort
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