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    CVE-2026-33934

    OpenEMR is a free and open source electronic health records and medical practice management application. Versions prior to 8.0.0.3 have a missing authorization check in `portal/sign/lib/show-signature.php` that allows any authenticated patient portal user to retrieve the drawn signature image of any staff member by supplying an arbitrary `user` value in the POST body. The companion write endpoint (`save-signature.php`) was already hardened against this same issue, but the read endpoint was not updated to match. Version 8.0.0.3 patches the issue.

    Published:Mar 25, 2026
    Last Modified:Mar 27, 2026
    EPS:Mar 25, 2026
    EPSS Score:0.00025
    CVSS Score:4.3

    Affected Products

    Vendor
    Open-emr
    Product
    Openemr
    Vendor
    Openemr
    Product
    Openemr

    Exploits

    https://github.com/openemr/openemr/security/advisories/GHSA-w9w5-7x6h-657q

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-665 Exploitation of Thunderbolt Protection Flaws

    Related CVEs

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    CVE-2026-67610 (CVSS 8.6) — OpenEMR through 8.2.0 contains an improper authentication vulnerability in the OAuth2 dynamic client registrat…
    CVE-2026-39932 (CVSS 9.4) — OpenEMR through 8.2.0 contains a remote code execution vulnerability in the document category tree component (…
    CVE-2026-39931 (CVSS 8.6) — OpenEMR through 8.2.0 contains an authenticated SQL injection vulnerability in the backup configuration import…
    CVE-2026-46518 (CVSS 7.7) — OpenEMR is a free and open source electronic health records and medical practice management application. Prior…
    CVE-2023-54347 (CVSS 8.7) — OpenEMR 7.0.1 contains an authentication brute force vulnerability that allows attackers to bypass rate limiti…
    CVE-2026-34056 (CVSS 7.7) — OpenEMR is a free and open source electronic health records and medical practice management application. A Bro…
    CVE-2026-34055 (CVSS 8.1) — OpenEMR is a free and open source electronic health records and medical practice management application. Prior…
    CVE-2026-34053 (CVSS 7.1) — OpenEMR is a free and open source electronic health records and medical practice management application. Prior…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High