{"affected":[{"defaultStatus":"unaffected","product":"openemr","source":"CNA: VulnCheck","vendor":"openemr","versions":[{"lessThan":"8.5.0","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"8.5.0","versionType":"semver"}]}],"cveId":"CVE-2026-126423","cwes":["CWE-409"],"description":"OpenEMR before 8.5.0 contains a denial of service vulnerability in four ZIP upload paths that read uncompressed entries into memory without size or ratio checks. Authenticated billing or Carecoordination users can upload highly compressed ZIP archives to exhaust PHP memory and worker pools, making OpenEMR unavailable.","epss":{"date":"2026-11-13","percentile":0.31758,"score":0.00373},"exploits":[],"kev":null,"metrics":[{"score":5.3,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0"},{"score":4.3,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},{"score":5.3,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":4.3,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}],"modifiedAt":1794585359971,"publishedAt":1794562531761,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-pqmf-m4h6-wjh4"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/openemr-before-8.5.0-denial-of-service-via-zip-upload-decompression"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-pqmf-m4h6-wjh4"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/openemr-before-8.5.0-denial-of-service-via-zip-upload-decompression"}],"remediation":[],"revision":"0c82fbd38a9c6ff4c851efa17ccf526ce67260d6ded6f7da795f714343474556","sources":[{"modifiedAt":1794585359971,"name":"CNA: VulnCheck","retrievedAt":1794586221424,"url":"https://www.cve.org/CVERecord?id=CVE-2026-126423"},{"modifiedAt":1794565068480,"name":"NVD","retrievedAt":1794572213220,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126423"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794586251499,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-126423"}],"ssvc":{"assessedAt":1794583813820,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"OpenEMR before 8.5.0 Denial of Service via ZIP Upload Decompression","updatedAt":1794586251499}