CVE-2026-126421

EUVD-2026-125022
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
4.3 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 31.76%
Common Weakness Enumeration
References
https://github.com/openemr/openemr/security/advisories/GHSA-3j3r-w7q7-h9fj
https://www.vulncheck.com/advisories/openemr-before-8.5.0-denial-of-service-via-labs-ajax-php-label-count