OpenEMR before 8.4.0 Authorization Bypass via checkUserHasAccessToPatient in SMART on FHIR
- Exploited
- No known exploitation
- Fix
- Fixed in 8.4.0
- Who is exposed
- Not reported
Do first: Upgrade to a fixed version: 8.4.0.
- 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? →
- 9/100 · provisional
- 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 in its SMART on FHIR implementation because checkUserHasAccessToPatient() in BearerTokenAuthorizationStrategy.php unconditionally returns true. Authenticated users or malicious SMART apps can manipulate token launch context to bind requests to arbitrary patient UUIDs, gaining unauthorized read/write access to other patients' FHIR resources.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure3/25Reachable over the network · Unknown: No advisory context yet
- Reach?/20Unknown. No tracked technology or package matched
- Severity6/10CVSS 6.0
- No patch0/5No signal
What would change the score
- Would score about 64 if added to CISA KEV
- Would score about 59 if CISA's SSVC rates exploitation active
- Would score about 28 if advisories confirm default setups are exposed
What to do
Upgrade 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.
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Questions about CVE-2026-124451
Is CVE-2026-124451 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
Which versions are affected by CVE-2026-124451?
openemr: before 8.4.0.Source: cve.now feed data
How do I fix CVE-2026-124451?
Upgrade to a fixed version: 8.4.0.Source: cve.now feed data