CVE-2026-5438
Gzip Decompression Bomb via Content-Encoding Header
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | orthanc |
| Product | dicom server |
| Published | Apr 9, 2026 |
| Last Updated | Apr 14, 2026 |
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Affected Versions
Orthanc / DICOM Server
0 ≤ 1.12.10