{"id":"CVE-2026-5439","aliases":["DEBIAN-CVE-2026-5439","EUVD-2026-20916","GHSA-6cmv-pvcc-pf5h","UBUNTU-CVE-2026-5439"],"status":"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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.00433,"percentile":0.37916,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-770"],"published":"2026-04-09T14:44:37Z","modified":"2026-10-27T09:47:37Z","fixes":[{"ecosystem":"Debian:14","package":"orthanc","fixed_in":["1.12.10+dfsg-4"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"orthanc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.1+dfsg-2","1.10.1+dfsg-2+deb12u1","1.12.1+dfsg-1","1.12.1+dfsg-2","1.12.1+dfsg-3","1.12.1+dfsg-4","1.12.10+dfsg-1","1.12.10+dfsg-2","1.12.10+dfsg-3","1.12.10+dfsg-4","1.12.10+dfsg-5","1.12.11+dfsg-1","1.12.11+dfsg-2","1.12.11+dfsg-3","1.12.11+dfsg-4","1.12.11+dfsg-5","1.12.11+dfsg-6","1.12.11+dfsg-7","1.12.11+dfsg-8","1.12.2+dfsg-1","1.12.3+dfsg-1","1.12.3+dfsg-2","1.12.4+dfsg-1","1.12.4+dfsg-2","1.12.4+dfsg-3","1.12.4+dfsg-4","1.12.5+dfsg-1","1.12.5+dfsg-2","1.12.6+dfsg-1","1.12.7+dfsg-1","1.12.7+dfsg-2","1.12.7+dfsg-3","1.12.7+dfsg-4","1.12.9+dfsg-1","1.12.9+dfsg-2","1.13.0+dfsg-1"]},{"source":"osv","ecosystem":"Debian:13","package":"orthanc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.12.10+dfsg-1","1.12.10+dfsg-2","1.12.10+dfsg-3","1.12.10+dfsg-4","1.12.10+dfsg-5","1.12.11+dfsg-1","1.12.11+dfsg-2","1.12.11+dfsg-3","1.12.11+dfsg-4","1.12.11+dfsg-5","1.12.11+dfsg-6","1.12.11+dfsg-7","1.12.11+dfsg-8","1.12.7+dfsg-4","1.12.9+dfsg-1","1.12.9+dfsg-2","1.13.0+dfsg-1"]},{"source":"osv","ecosystem":"Debian:14","package":"orthanc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.12.10+dfsg-4"}]}],"versions":["1.12.10+dfsg-1","1.12.10+dfsg-2","1.12.10+dfsg-3","1.12.7+dfsg-4","1.12.9+dfsg-1","1.12.9+dfsg-2"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"orthanc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.4+dfsg-1","0.9.4+dfsg-2","0.9.5+dfsg-1","1.0.0+dfsg-1","1.0.0+dfsg-1build1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"orthanc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.0+dfsg-1build1","1.3.0+dfsg-1build2","1.3.1+dfsg-1","1.3.1+dfsg-1build1","1.3.1+dfsg-1build2"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"orthanc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.7+dfsg-2","1.5.8+dfsg-2","1.5.8+dfsg-2ubuntu2","1.5.8+dfsg-2ubuntu3","1.5.8+dfsg-2ubuntu4","1.5.8+dfsg-2ubuntu5","1.5.8+dfsg-2ubuntu6"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"orthanc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.9.2+really1.9.1+dfsg-1","1.9.7+dfsg-3ubuntu1","1.9.7+dfsg-3ubuntu2","1.9.7+dfsg-4","1.9.7+dfsg-5","1.9.7+dfsg-6","1.10.0+dfsg-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"orthanc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.12.1+dfsg-3","1.12.1+dfsg-4","1.12.1+dfsg-4build1","1.12.2+dfsg-1","1.12.2+dfsg-1build3","1.12.2+dfsg-1build4"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"orthanc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.12.6+dfsg-1","1.12.7+dfsg-4","1.12.7+dfsg-4build2"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"orthanc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.12.10+dfsg-2","1.12.11+dfsg-8","1.12.11+dfsg-8build1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"orthanc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.12.7+dfsg-4build2","1.12.9+dfsg-2","1.12.10+dfsg-1","1.12.10+dfsg-1build1","1.12.10+dfsg-2"]}],"products":[{"vendor":"orthanc","product":"dicom server"},{"vendor":"orthanc-server","product":"orthanc"}],"references":[{"url":"https://www.orthanc-server.com/","tags":["Product","report"]},{"url":"https://www.machinespirits.de/","tags":["Not Applicable","report"]},{"url":"https://kb.cert.org/vuls/id/536588","tags":["Third Party Advisory","VDB Entry","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5439"},{"url":"https://www.machinespirits.de"},{"url":"https://www.orthanc-server.com"},{"url":"https://github.com/advisories/GHSA-6cmv-pvcc-pf5h"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-5439","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-5439","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-5439","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-5439","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.","status":"published","published":"2026-04-09T14:44:37.078Z","modified":"2026-04-14T16:34:14.439Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp"}],"updated_at":"2026-11-02T13:39:39.001586Z"}],"euvd":[{"id":"EUVD-2026-20916","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.","status":"published","published":"2026-04-09T14:44:37Z","modified":"2026-04-14T16:34:14Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T19:24:25.607055Z"}],"ghsa":[{"id":"GHSA-6cmv-pvcc-pf5h","title":"A memory exhaustion vulnerability exists in ZIP archive processing. Orthanc automatically...","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.","status":"published","published":"2026-04-09T15:35:08Z","modified":"2026-04-15T21:30:15Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:07:30.592661Z"}],"nvd":[{"id":"CVE-2026-5439","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.","status":"published","published":"2026-04-09T15:16:15.443Z","modified":"2026-10-26T21:10:00.17Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:12:13.902911Z"}],"osv":[{"id":"DEBIAN-CVE-2026-5439","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.","status":"published","published":"2026-04-09T15:16:15.443Z","modified":"2026-10-27T09:47:37.804207106Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:57.236551Z"},{"id":"UBUNTU-CVE-2026-5439","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.","status":"published","published":"2026-04-09T15:16:00Z","modified":"2026-10-17T12:58:35.885541537Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T16:56:41.382716Z"}]}}