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.
Affected products
orthanc-server: orthanc
References3
- kb.cert.org/vuls/id/536588 Third Party AdvisoryVDB Entry
- www.machinespirits.de/ Not Applicable
- www.orthanc-server.com/ Product
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 43 · as of 12 November 2026
- CWE
- CWE-770
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