Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 6.8%
CVSS Severity
CVSS v3 Score 4.3
References
Products affected by CVE-2026-33934
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cpe:2.3:a:open-emr:openemr:-
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cpe:2.3:a:open-emr:openemr:2.0.1.2
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cpe:2.3:a:open-emr:openemr:2.7
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cpe:2.3:a:open-emr:openemr:2.7.1
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cpe:2.3:a:open-emr:openemr:2.7.2
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cpe:2.3:a:open-emr:openemr:2.7.3
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cpe:2.3:a:open-emr:openemr:2.8.0
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cpe:2.3:a:open-emr:openemr:2.8.1
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cpe:2.3:a:open-emr:openemr:2.8.2
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cpe:2.3:a:open-emr:openemr:2.8.3
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cpe:2.3:a:open-emr:openemr:2.9.0
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cpe:2.3:a:open-emr:openemr:3.0.0
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cpe:2.3:a:open-emr:openemr:3.0.1
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cpe:2.3:a:open-emr:openemr:3.1.0
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cpe:2.3:a:open-emr:openemr:3.2.0
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cpe:2.3:a:open-emr:openemr:4.0.0
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cpe:2.3:a:open-emr:openemr:4.1.0
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cpe:2.3:a:open-emr:openemr:4.1.1
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cpe:2.3:a:open-emr:openemr:4.1.2
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cpe:2.3:a:open-emr:openemr:4.1.2.3
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cpe:2.3:a:open-emr:openemr:4.1.2.6
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cpe:2.3:a:open-emr:openemr:4.1.2.7
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cpe:2.3:a:open-emr:openemr:4.2.0
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cpe:2.3:a:open-emr:openemr:4.2.0.3
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cpe:2.3:a:open-emr:openemr:4.2.1
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cpe:2.3:a:open-emr:openemr:4.2.2
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cpe:2.3:a:open-emr:openemr:5.0.0
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cpe:2.3:a:open-emr:openemr:5.0.0.5
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cpe:2.3:a:open-emr:openemr:5.0.0.6
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cpe:2.3:a:open-emr:openemr:5.0.1
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cpe:2.3:a:open-emr:openemr:5.0.1-6
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cpe:2.3:a:open-emr:openemr:5.0.1.1
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cpe:2.3:a:open-emr:openemr:5.0.1.2
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cpe:2.3:a:open-emr:openemr:5.0.1.3
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cpe:2.3:a:open-emr:openemr:5.0.1.4
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cpe:2.3:a:open-emr:openemr:5.0.1.5
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cpe:2.3:a:open-emr:openemr:5.0.1.6
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cpe:2.3:a:open-emr:openemr:5.0.1.7
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cpe:2.3:a:open-emr:openemr:5.0.2
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cpe:2.3:a:open-emr:openemr:5.0.2.1
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cpe:2.3:a:open-emr:openemr:5.0.2.2
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cpe:2.3:a:open-emr:openemr:5.0.2.3
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cpe:2.3:a:open-emr:openemr:5.0.2.4
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cpe:2.3:a:open-emr:openemr:5.0.2.5
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cpe:2.3:a:open-emr:openemr:6.0.0
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cpe:2.3:a:open-emr:openemr:6.0.0.1
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cpe:2.3:a:open-emr:openemr:6.0.0.2
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cpe:2.3:a:open-emr:openemr:6.0.0.3
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cpe:2.3:a:open-emr:openemr:6.0.0.4
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cpe:2.3:a:open-emr:openemr:6.1.0
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cpe:2.3:a:open-emr:openemr:6.1.0.1
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cpe:2.3:a:open-emr:openemr:7.0.0
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cpe:2.3:a:open-emr:openemr:7.0.0.1
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cpe:2.3:a:open-emr:openemr:7.0.0.2
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cpe:2.3:a:open-emr:openemr:7.0.1
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cpe:2.3:a:open-emr:openemr:7.0.1.1
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cpe:2.3:a:open-emr:openemr:7.0.2
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cpe:2.3:a:open-emr:openemr:7.0.2.1
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cpe:2.3:a:open-emr:openemr:7.0.2.2
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cpe:2.3:a:open-emr:openemr:7.0.2.3
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cpe:2.3:a:open-emr:openemr:7.0.3
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cpe:2.3:a:open-emr:openemr:7.0.3.1
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cpe:2.3:a:open-emr:openemr:7.0.3.2
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cpe:2.3:a:open-emr:openemr:7.0.3.3
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cpe:2.3:a:open-emr:openemr:7.0.3.4
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cpe:2.3:a:open-emr:openemr:7.0.4
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cpe:2.3:a:open-emr:openemr:7.3.0
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cpe:2.3:a:open-emr:openemr:8.0.0