{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-5438", "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b", "state": "PUBLISHED", "assignerShortName": "certcc", "dateReserved": "2026-04-02T19:21:58.543Z", "datePublished": "2026-04-09T14:44:05.375Z", "dateUpdated": "2026-04-09T14:44:05.375Z"}, "containers": {"cna": {"title": "Gzip Decompression Bomb via Content-Encoding Header", "descriptions": [{"lang": "en", "value": "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": {"discovery": "UNKNOWN"}, "affected": [{"vendor": "Orthanc", "product": "DICOM Server", "versions": [{"status": "affected", "version": "0", "lessThanOrEqual": "1.12.10", "versionType": "custom"}]}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-770 Allocation of Resources Without Limits or Throttling"}]}], "references": [{"url": "https://www.orthanc-server.com/"}, {"url": "https://www.machinespirits.de/"}, {"url": "https://kb.cert.org/vuls/id/536588"}], "x_generator": {"engine": "VINCE 3.0.35", "env": "prod", "origin": "https://cveawg.mitre.org/api/cve/CVE-2026-5438"}, "providerMetadata": {"orgId": "37e5125f-f79b-445b-8fad-9564f167944b", "shortName": "certcc", "dateUpdated": "2026-04-09T14:44:05.375Z"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-5438", "lastModified": "2026-04-09T15:16:15.327", "metrics": {}, "published": "2026-04-09T15:16:15.327", "references": [{"source": "cret@cert.org", "url": "https://kb.cert.org/vuls/id/536588"}, {"source": "cret@cert.org", "url": "https://www.machinespirits.de/"}, {"source": "cret@cert.org", "url": "https://www.orthanc-server.com/"}], "sourceIdentifier": "cret@cert.org", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,1.12.10]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "DICOM Server", "source": "cna", "vendor": "Orthanc"}, "product": "dicom_server", "vendor": "orthanc"}], "created": "2026-04-10T08:53:23.745803+00:00", "updated": "2026-04-10T08:53:23.745886+00:00", "vendors": ["orthanc", "orthanc$PRODUCT$dicom_server"]}