{"id":"CVE-2026-126421","summary":"OpenEMR before 8.5.0 Denial of Service via labs_ajax.php Label Count","details":"OpenEMR before 8.5.0 contains an uncontrolled resource consumption vulnerability that allows authenticated users with patients/med access to exhaust PHP workers via an unbounded count parameter. Attackers can send print_labels requests to labs_ajax.php with huge counts, forcing mPDF page and barcode generation that makes OpenEMR unavailable.","aliases":["GHSA-3j3r-w7q7-h9fj"],"modified":"2026-11-14T02:47:28.581550200Z","published":"2026-11-13T09:35:33.115Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126421.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-770"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126421.json"},{"type":"ADVISORY","url":"https://github.com/openemr/openemr/security/advisories/GHSA-3j3r-w7q7-h9fj"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126421"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/openemr-before-8.5.0-denial-of-service-via-labs-ajax-php-label-count"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/openemr/openemr","events":[{"introduced":"0"},{"fixed":"c1b2b8bcbe91aa81858f7ba8b25c31d9a82639a5"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"0"},{"fixed":"8.5.0"}],"source":"AFFECTED_FIELD","strategy":"StandardRange"}]}}],"versions":["v3_0_1","v3_0_0","v2_9_0","v2_8_3","v2_8_2","v2_8_1","v2_8_0","v2_7_3-rc1","v2_7_2","v2_7_2-rc2","v2_7_2-rc1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-126421.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"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"}]}