{"id":"CVE-2026-5439","state":"PUBLISHED","title":"Memory Exhaustion via Forged ZIP Metadata","description":"A memory exhaustion vulnerability exists in ZIP archive processing. Orthanc automatically extracts ZIP archives uploaded to certain endpoints and trusts metadata fields describing the uncompressed size of archived files. An attacker can craft a small ZIP archive containing a forged size value, causing the server to allocate extremely large buffers during extraction.","publishedAt":"2026-04-09T14:44:37.078Z","updatedAt":"2026-04-14T16:34:14.439Z","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-2026-5439.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-5439","state":"PUBLISHED","datePublished":"2026-04-09T14:44:37.078Z","dateUpdated":"2026-04-14T16:34:14.439Z","assignerShortName":"certcc","assignerOrgId":"37e5125f-f79b-445b-8fad-9564f167944b","dateReserved":"2026-04-02T19:22:13.583Z"},"containers":{"cna":{"title":"Memory Exhaustion via Forged ZIP Metadata","descriptions":[{"lang":"en","value":"A memory exhaustion vulnerability exists in ZIP archive processing. Orthanc automatically extracts ZIP archives uploaded to certain endpoints and trusts metadata fields describing the uncompressed size of archived files. An attacker can craft a small ZIP archive containing a forged size value, causing the server to allocate extremely large buffers during extraction."}],"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":"2026-04-09T14:44:37.078Z"},"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"VINCE 3.0.35","env":"prod","origin":"https://cveawg.mitre.org/api/cve/CVE-2026-5439"}},"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":"2026-04-14T15:15:14.226462Z","id":"CVE-2026-5439","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":"2026-04-14T16:34:14.439Z"}}]}}}