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.
Published: 2026-11-13
Score: 5.3 Medium
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

No solution or workaround provided in the CVE record.

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Tracking

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Advisories

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History

Fri, 13 Nov 2026 19:30:00 +0000

Type Values Removed Values Added
First Time appeared Openemr
Openemr openemr
Vendors & Products Openemr
Openemr openemr

Fri, 13 Nov 2026 09:45:00 +0000

Type Values Removed Values Added
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.
Title OpenEMR before 8.5.0 Denial of Service via ZIP Upload Decompression
First Time appeared Open-emr
Open-emr openemr
Weaknesses CWE-409
CPEs cpe:2.3:a:open-emr:openemr:*:*:*:*:*:*:*:*
Vendors & Products Open-emr
Open-emr openemr
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L'}

cvssV4_0

{'score': 5.3, '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-13T15:55:59.971Z

Reserved: 2026-11-10T21:36:07.090Z

Link: CVE-2026-126423

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-11-13T10:17:48.363

Modified: 2026-11-13T16:18:27.520

Link: CVE-2026-126423

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-13T19:15:21Z

Weaknesses
  • CWE-409

    Improper Handling of Highly Compressed Data (Data Amplification)