CVE-2026-126423

MEDIUM 4.3

OpenEMR before 8.5.0 Denial of Service via ZIP Upload Decompression

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-409
Vendor	openemr
Product	openemr
Published	Nov 13, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Affected Versions

openemr / openemr

0 < 8.5.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/openemr/openemr/security/advisories/GHSA-pqmf-m4h6-wjh4 vulncheck.com: https://www.vulncheck.com/advisories/openemr-before-8.5.0-denial-of-service-via-zip-upload-decompression

Credits

🔍 farisv