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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Orthanc | DICOM Server | affected |
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Project Subscriptions
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Advisories
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Fixes
Solution
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Workaround
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References
History
Thu, 09 Apr 2026 15:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Gzip Decompression Bomb via Content-Encoding Header | |
| References |
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Projects
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MITRE
Status: PUBLISHED
Assigner: certcc
Published:
Updated: 2026-04-09T14:44:05.375Z
Reserved: 2026-04-02T19:21:58.543Z
Link: CVE-2026-5438
Vulnrichment
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NVD
Status : Received
Published: 2026-04-09T15:16:15.327
Modified: 2026-04-09T15:16:15.327
Link: CVE-2026-5438
Redhat
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OpenCVE Enrichment
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Weaknesses
No weakness.