CVE
OpenEMR missing authorization in procedure order form
Affects OpenEMR before 8.5.0 for authenticated core accounts that lack the patients/lab permission on the procedure order form. Fixed in 8.5.0.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in 8.5.0
- Who is exposed
- Specific setups only
Do first: Check whether your setup matches what the bug needs. Affected OpenEMR versions are before 8.5.0 Attacker holds an authenticated core account without patients/lab permission
- Published
- Last modified
- Whether it needs action now or is a reference record, by fixed rules, with why. Last checked is when cve.now last re-read it.What do these mean? →
- Reference
- Last checked
- FIRST's estimate of the chance attackers exploit it in the next 30 days, updated daily.What do these mean? →
- 0.36% · 30th percentile
- 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? →
- 17/100 · 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 8.5.0 contains a missing authorization vulnerability in interface/forms/procedure_order/common.php that allows authenticated accounts lacking patients/lab permission to read and modify other patients' procedure orders. Attackers can request a global order id to disclose clinical history, or select the target patient in their session and submit bn_save to falsify diagnoses, instructions, and order status.
Who should check
Teams running OpenEMR before 8.5.0, especially staff accounts without patients/lab permission
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
- Severity8.6/10CVSS 8.6
- No patch0/5No signal
What would change the score
- Would score about 67 if added to CISA KEV
- Would score about 62 if CISA's SSVC rates exploitation active
- Would score about 24 if CISA's SSVC rates it automatable
What to do
Check whether your setup matches what the bug needs.
Affected OpenEMR versions are before 8.5.0 Attacker holds an authenticated core account without patients/lab permissionUpgrade to a fixed version: 8.5.0.
Check your systems with an agent
Paste this into a coding or ops agent. It checks your systems read-only and reports a table per asset.
Check whether my systems are affected by CVE-2026-126434 (OpenEMR before 8.5.0 Missing Authorization in Procedure Order Form), using the cve.now data below.
Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.
What cve.now has for CVE-2026-126434 (entry last updated 2026-11-13):
Affected:
- openemr openemr: fixed in 8.5.0
Fixed versions: 8.5.0.
Conditions (all must be true for the bug to be hit):
- Affected OpenEMR versions are before 8.5.0 (source: https://www.vulncheck.com/advisories/openemr-before-8.5.0-missing-authorization-in-procedure-order-form)
- Attacker holds an authenticated core account without patients/lab permission (source: https://github.com/openemr/openemr/security/advisories/GHSA-q5c6-96vf-rx9v)
Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory.
Attacker needs: network access, low-privilege login, no user action.
CISA KEV: CVE-2026-126434 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-126434 only. If you also check another CVE, look up its own KEV status; never assume it from this one.
How to check:
- Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory.
Verify against the linked advisories before concluding, and cite the date you read each one:
- https://github.com/openemr/openemr/security/advisories/GHSA-q5c6-96vf-rx9v
- https://www.vulncheck.com/advisories/openemr-before-8.5.0-missing-authorization-in-procedure-order-form
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.
Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action.
Entry: https://cve.now/CVE-2026-126434
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example execute with name cve.get and arguments {"id": "CVE-2026-126434"}.Timeline
- CVE published
- First seen by cve.now
Affected versions
- openemr openemr
fixed in 8.5.0
Evidence 4
Vendor advisory · 1
Establishes: Affected and fixed versions.
- Advisory
CVE record · 2
Establishes: The identifier and description.
- Record
- Record
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-126434
Is CVE-2026-126434 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 staff account without the patients/lab permission can read other patients' procedure orders and modify their clinical history, diagnosis, instructions, status and other order fields.Source: vulncheck.com, github.com
Which versions are affected by CVE-2026-126434?
openemr: before 8.5.0.Source: cve.now feed data
Am I affected, and how do I check?
OpenEMR versions before 8.5.0 are affected, and the issue requires an authenticated core account without the patients/lab permission declared for the encounter form. Check the installed OpenEMR version and whether the account holds that permission.Source: vulncheck.com, github.com
How do I fix CVE-2026-126434?
Upgrade to OpenEMR 8.5.0 or later, which is the fixed version listed for this vulnerability.Source: vulncheck.com, github.com