OpenEMR: Missing Write ACL Allows Unauthorized Document Reassignment
- Exploited
- Proof of concept public, per CISA
- Fix
- Fixed in 8.4.0
- Who is exposed
- Specific setups only
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? →
- 33/100 · 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
- Exploitation: poc
- Automatable: no
- Technical impact: total
Summary
OpenEMR, a free electronic health records and medical practice management application, is affected. A low-privilege logged-in user can remotely reassign any document to a patient or category they can access, then retrieve it, even though the write runs before the access check and a 403 response does not mean the change was blocked.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
Read the original description
OpenEMR is a free and open source electronic health records and medical practice management application. Prior to 8.4.0, controllers/C_Document.class.php write actions, including move_action_process(), do not verify the caller's access to the source document, current patient and category, or destination patient and category before Document::change_patient() performs the mutation. A low-privilege authenticated user can reassign an arbitrary document to a patient or category the user can access and then retrieve it through the normally protected read path. The reassignment occurs before a later list rendering check, so a final HTTP 403 response does not mean the unauthorized write was blocked. This issue is fixed in version 8.4.0.
cve.now Index
- Exploitation15/40CISA rates a proof of concept as public
- Exposure8/25Specific setups only, reachable over the network
- Reach?/20Unknown. No tracked technology or package matched
- Severity10/10CVSS 9.6, total technical impact per CISA
- No patch0/5No signal
What would change the score
- Would score about 68 if added to CISA KEV
- Would score about 63 if CISA's SSVC rates exploitation active
- Would score about 40 if CISA's SSVC rates it automatable
What to do
Upgrade to a fixed version: 8.4.0.
Timeline
- CVE published
- First seen by cve.now
- Posted on X by cve.now
- CISA SSVC assessment
Exploitation: poc · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- openemr openemr
fixed in 8.4.0
Evidence 4
- Advisory
- Repository
- Repository
- Repository
Corrections
None so far.
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Questions about CVE-2026-102940
Is CVE-2026-102940 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. CISA's SSVC assessment notes a proof of concept exists. No public exploit code is tracked.Source: cve.now feed data
Which versions are affected by CVE-2026-102940?
openemr: before 8.4.0.Source: cve.now feed data
How do I fix CVE-2026-102940?
Upgrade to a fixed version: 8.4.0.Source: cve.now feed data