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I. Basic Information for CVE-2026-5438
Vulnerability Information

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Vulnerability Title
Gzip Decompression Bomb via Content-Encoding Header
Source: NVD (National Vulnerability Database)
Vulnerability Description
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 allocates memory based on attacker-controlled compression metadata. A specially crafted gzip payload can trigger excessive memory allocation and exhaust system memory.
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,该漏洞源于处理带有Content-Encoding: gzip的HTTP请求时存在gzip解压缩炸弹漏洞,可能导致触发过度内存分配并耗尽系统内存。
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
VendorProductAffected VersionsCPESubscribe
OrthancDICOM Server 0 ~ 1.12.10 -
II. Public POCs for CVE-2026-5438
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III. Intelligence Information for CVE-2026-5438
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