HOMEVULNERABILITIESCVE-2026-33934
MEDIUM

CVE-2026-33934

CWE-639Published: March 26, 2026· Updated: Mar 26, 2026

4.3
CVSS v3.1
EPSS:0.04%probability of exploitation in 30 daysPercentile:11.1th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-33934 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected Vendors & Products

open-emr1 product
openemr
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/openemr/openemr/commit/ae7ee1872d2e6300b165e24687cc90cf6847a4e5
ADVISORYhttps://github.com/openemr/openemr/security/advisories/GHSA-w9w5-7x6h-657q

All References (3)

→
https://github.com/openemr/openemr/commit/ae7ee1872d2e6300b165e24687cc90cf6847a4e5Patch
→
https://github.com/openemr/openemr/releases/tag/v8_0_0_3Product
→
https://github.com/openemr/openemr/security/advisories/GHSA-w9w5-7x6h-657qExploit · Vendor Advisory

Quick Facts

CVE IDCVE-2026-33934
CVSS Score4.3 / 10
SeverityMEDIUM
WeaknessCWE-639
CISA KEVNo
EPSS (30d)0.04%
Affected1 vendor
PublishedMar 26, 2026

Related CVEs (CWE-639)

CVE-2026-55255
KEV9.9
CVE-2026-29200
9.9
CVE-2026-52782
9.9
CVE-2026-45552
9.9
CVE-2026-12073
9.8
CVE-2018-25270
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-33934 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2026-33934·NVD