CVE-2026-5445— Out-of-Bounds Read in DicomImageDecoder (DecodeLookupTable)
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I. Basic Information for CVE-2026-5445
Vulnerability Information
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Vulnerability Title
Out-of-Bounds Read in DicomImageDecoder (DecodeLookupTable)
Source: NVD (National Vulnerability Database)
Vulnerability Description
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 not validate pixel indices against the lookup table size. Crafted images containing indices larger than the palette size cause the decoder to read beyond allocated lookup table memory and expose heap contents in the output image.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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DecodeLookupTable函数存在越界读取，可能导致解码器读取超出分配的查找表内存并将堆内容暴露在输出图像中。
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-2026-5445
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Orthanc · 2026-04-09 · 9 CVEs total
| CVE-2026-5444 | Heap Buffer Overflow in PAM Image Buffer Allocation | |
| 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-2026-5440 | 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
- CVE-2026-5439
Memory Exhaustion via Forged ZIP Metadata - CVE-2026-5437
Out-of-Bounds Read in DicomStreamReader - CVE-2026-5438
Gzip Decompression Bomb via Content-Encoding Header - CVE-2026-5440
Memory Exhaustion via Unbounded Content-Length - CVE-2026-5442
Heap Buffer Overflow in DICOM Image Decoder via VR UL Dimens
Same vendor: Orthanc
- CVE-2026-5439
Memory Exhaustion via Forged ZIP Metadata - CVE-2026-5437
Out-of-Bounds Read in DicomStreamReader - CVE-2026-5438
Gzip Decompression Bomb via Content-Encoding Header - CVE-2026-5440
Memory Exhaustion via Unbounded Content-Length - CVE-2026-5442
Heap Buffer Overflow in DICOM Image Decoder via VR UL Dimens
V. Comments for CVE-2026-5445
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