{"id":"CVE-2026-5440","state":"PUBLISHED","title":"Memory Exhaustion via Unbounded Content-Length","description":"A memory exhaustion vulnerability exists in the HTTP server due to unbounded use of the `Content-Length` header.  The server allocates memory directly based on the attacker supplied header value without enforcing an upper limit. A crafted HTTP request containing an extremely large `Content-Length` value can trigger excessive memory allocation and server termination, even without sending a request body.","publishedAt":"2026-04-09T14:43:55.684Z","updatedAt":"2026-04-14T16:34:31.991Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"certcc","products":["Orthanc DICOM Server"],"affected":[{"vendor":"Orthanc","product":"DICOM Server","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.12.10","versionType":"custom"}]}],"references":["https://www.orthanc-server.com/","https://www.machinespirits.de/","https://kb.cert.org/vuls/id/536588"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:32.778Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/5xxx/CVE-2026-5440.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-5440","state":"PUBLISHED","datePublished":"2026-04-09T14:43:55.684Z","dateUpdated":"2026-04-14T16:34:31.991Z","assignerShortName":"certcc","assignerOrgId":"37e5125f-f79b-445b-8fad-9564f167944b","dateReserved":"2026-04-02T19:22:26.410Z"},"containers":{"cna":{"title":"Memory Exhaustion via Unbounded Content-Length","descriptions":[{"lang":"en","value":"A memory exhaustion vulnerability exists in the HTTP server due to unbounded use of the `Content-Length` header.  The server allocates memory directly based on the attacker supplied header value without enforcing an upper limit. A crafted HTTP request containing an extremely large `Content-Length` value can trigger excessive memory allocation and server termination, even without sending a request body."}],"affected":[{"vendor":"Orthanc","product":"DICOM Server","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.12.10","versionType":"custom"}]}],"references":[{"url":"https://www.orthanc-server.com/"},{"url":"https://www.machinespirits.de/"},{"url":"https://kb.cert.org/vuls/id/536588"}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-770 Allocation of Resources Without Limits or Throttling"}]}],"providerMetadata":{"shortName":"certcc","orgId":"37e5125f-f79b-445b-8fad-9564f167944b","dateUpdated":"2026-04-09T14:43:55.684Z"},"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"VINCE 3.0.35","env":"prod","origin":"https://cveawg.mitre.org/api/cve/CVE-2026-5440"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-04-14T15:12:48.721931Z","id":"CVE-2026-5440","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-14T16:34:31.991Z"}}]}}}