OpenEMR before 8.4.0 FHIR Patient Compartment Bypass via QuestionnaireResponse
OpenEMR versions before 8.4.0 let a holder of a patient-launch SMART token with the patient/QuestionnaireResponse.rs scope read other patients' questionnaire responses. Fixed in 8.4.0.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in 8.4.0
- Who is exposed
- Specific setups only
Do first: Check whether your setup matches what the bug needs. OpenEMR versions before 8.4.0 Attacker holds a patient-scoped SMART token with the patient/QuestionnaireResponse.rs scope
- Last modified
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 15/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Specific setups only
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
OpenEMR before 8.4.0 contains an authorization bypass vulnerability that allows patient-scoped SMART tokens to read other patients' questionnaire responses because FhirQuestionnaireResponseService does not implement IPatientCompartmentResourceService. Attackers holding a patient/QuestionnaireResponse.rs token can request responses by uuid or list the unfiltered bundle to obtain cross-patient clinical assessment answers.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure8/25Specific setups only, reachable over the network
- Reach?/20Unknown. No tracked technology or package matched
- Severity7.1/10CVSS 7.1
- No patch0/5No signal
What would change the score
- Would score about 65 if added to CISA KEV
- Would score about 60 if CISA's SSVC rates exploitation active
- Would score about 22 if CISA's SSVC rates it automatable
What to do
Check whether your setup matches what the bug needs.
OpenEMR versions before 8.4.0 Attacker holds a patient-scoped SMART token with the patient/QuestionnaireResponse.rs scopeUpgrade to a fixed version: 8.4.0.
Timeline
- CVE published
- First seen by cve.now
Affected versions
- openemr openemr
fixed in 8.4.0
Evidence 2
- Advisory
- Link
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-124464
Is CVE-2026-124464 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
A patient-launch SMART token holder can read other patients' questionnaire responses, including clinical assessment answers. This works by requesting a response by uuid or by listing the unfiltered bundle.Source: vulncheck.com, github.com
Which versions are affected by CVE-2026-124464?
openemr: before 8.4.0.Source: cve.now feed data
Am I affected, and how do I check?
OpenEMR versions before 8.4.0 are in scope, when the attacker holds a patient-scoped SMART token with the patient/QuestionnaireResponse.rs scope. To check a version, look at the installed OpenEMR version number.Source: vulncheck.com, github.com
How do I fix CVE-2026-124464?
Upgrade to OpenEMR 8.4.0, which contains the fix.Source: vulncheck.com, github.com