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CVE-2026-5444— Heap Buffer Overflow in PAM Image Buffer Allocation

Quick assessment

Affected
Orthanc DICOM Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Orthanc是Orthanc公司的一款免费的开源软件。 Orthanc存在安全漏洞，该漏洞源于PAM图像解析逻辑存在堆缓冲区溢出，可能导致整数溢出并在像素处理期间分配小缓冲区后进行更大的写入操作。

AI Predicted 7.8 Difficulty: Easy EPSS 0.16% · P6

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2026-5444

Vulnerability Information
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Vulnerability Title
Heap Buffer Overflow in PAM Image Buffer Allocation
Source: CVE Program / CVE List V5
Vulnerability Description
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 using 32-bit unsigned arithmetic. Specially chosen values can cause an integer overflow during buffer size calculation, resulting in the allocation of a small buffer followed by a much larger write operation during pixel processing.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Orthanc 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Orthanc是Orthanc公司的一款免费的开源软件。 Orthanc存在安全漏洞，该漏洞源于PAM图像解析逻辑存在堆缓冲区溢出，可能导致整数溢出并在像素处理期间分配小缓冲区后进行更大的写入操作。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Orthanc DICOM Server 0 ~ 1.12.10 -

II. Public POCs for CVE-2026-5444

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III. Intelligence Information for CVE-2026-5444

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Vendor Advisories for CVE-2026-5444 (1)

Same Patch Batch · Orthanc · 2026-04-09 · 9 CVEs total

CVE-2026-5442 Heap Buffer Overflow in DICOM Image Decoder via VR UL Dimensions
CVE-2026-5441 Out-of-Bounds Read in DicomImageDecoder (PMSCT_RLE1 Decompression)
CVE-2026-5445 Out-of-Bounds Read in DicomImageDecoder (DecodeLookupTable)
CVE-2026-5440 Memory Exhaustion via Unbounded Content-Length
CVE-2026-5443 Heap Buffer Overflow in DICOM Image Decoder (Palette Color Decode)
CVE-2026-5438 Gzip Decompression Bomb via Content-Encoding Header
CVE-2026-5439 Memory Exhaustion via Forged ZIP Metadata
CVE-2026-5437 Out-of-Bounds Read in DicomStreamReader

IV. Related Vulnerabilities

Same product: DICOM Server
Same vendor: Orthanc

V. Comments for CVE-2026-5444

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