Vulnerability record
CVE-2026-126466
The short answer
CVE-2026-126466 affects openemr openemr and is rated high (CVSS 8.7). It is not in CISA's KEV catalog; EPSS puts the chance of exploitation in the next 30 days at 0.44%.
What it is
OpenEMR before 8.5.0 contains a missing authorization vulnerability that allows any authenticated user to create patient records and enumerate patients by omitting aclCheckCore() checks. Attackers can POST to new_comprehensive_save.php to create patients with insurance PHI, or query new_search_popup.php and patient_select.php to leak names, SSNs and DOBs.
Weakness: CWE-862.
Severity
8.7 high
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Exploited (CISA KEV)
Not listed
CISA lists confirmed exploitation only
EPSS, next 30 days
0.44%
Higher than 39% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- Low
- User interaction
- None
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Affected products
openemr. NVD's record lists the exact affected versions.
References
Questions
Is CVE-2026-126466 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog as of 2026-11-13. FIRST's EPSS estimates a 0.44% chance of exploitation in the next 30 days.
How do I fix CVE-2026-126466?
Follow the vendor advisory in the references below. NVD lists the affected versions under its configurations.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Undergoing Analysis. The description is NVD's text, quoted as published.
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