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Medium · 4.3 CVE-2026-126423 EUVD-2026-125020GHSA-7vg3-gh88-pxm8

OpenEMR before 8.5.0 Denial of Service via ZIP Upload Decompression

Published Nov 13, 2026 · Updated Nov 13, 2026 · Assigned by VulnCheck

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.

Affected products

VendorProductAffectedFixed
openemr openemr < 8.5.0 8.5.0

References