CVE-2026-46518Public exploitNetwork attack vector

Clinician-session script execution via unescaped patient demographics

Published Jun 9, 2026 · Updated Jun 9, 2026

Stored XSS in OpenEMR before 8.0.0.1 allows remote authenticated users to execute JavaScript in a clinician's browser session. multiprintcss_header() emits patient names and addresses without HTML encoding after the patient API writes those values directly to patient_data. Exploitation requires patient-portal credentials, an existing prescription, and a clinician opening CSS/HTML multi-print; the script can read session data and act with clinician privileges.

CVSS severity7.7
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in OpenEMR before 8.0.0.1 allows remote authenticated users to execute JavaScript in a clinician's browser session. multiprintcss_header() emits patient names and addresses without HTML encoding after the patient API writes those values directly to patient_data. Exploitation requires patient-portal credentials, an existing prescription, and a clinician opening CSS/HTML multi-print; the script can read session data and act with clinician privileges.

The record

CVE
CVE-2026-46518
Published
Jun 9, 2026
Updated
Jun 9, 2026
Vendor
OpenEMR Foundation
Product
OpenEMR
Classifications
CWE-79, CWE-862, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 8.0.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenEMR Foundation · OpenEMRversion=< 8.0.0.1

Published CVSS scores

8.7NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
7.7GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-862Missing Authorization
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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