OpenEMR before 8.4.0 Improper Authorization in FHIR DocumentReference $docref
Affects OpenEMR before 8.4.0, where a FHIR user with only demographics and document permissions can reach other patients' clinical data. Fixed in 8.4.0.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in 8.4.0
- Who is exposed
- Specific setups only
Do first: Check whether your setup matches what the bug needs. OpenEMR versions before 8.4.0 Attacker is a FHIR user with demographics and document permissions (patients/demo)
- Last modified
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 15/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Specific setups only
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
OpenEMR before 8.4.0 contains an improper authorization vulnerability in the non-patient POST /fhir/DocumentReference/$docref route that allows low-privileged users to generate any patient's CCDA. Attackers with only demographics and documents permissions can supply a victim patient parameter, then download the full-chart CCDA from Patient Documents to exfiltrate clinical data.
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 is a FHIR user with demographics and document permissions (patients/demo)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.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-124487
Is CVE-2026-124487 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 low-privileged FHIR user with only demographics and document permissions can use the DocumentReference $docref operation to download a freshly generated full-chart CCDA of any patient. This exposes another patient's clinical data.Source: vulncheck.com, github.com
Which versions are affected by CVE-2026-124487?
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 affected. The relevant setup is a FHIR user whose permissions include demographics and documents, which the advisory describes as patients/demo scope.Source: vulncheck.com, github.com
How do I fix CVE-2026-124487?
Upgrade OpenEMR to version 8.4.0, the patched release listed in the advisory.Source: vulncheck.com, github.com