CVE-2026-126494 json
OpenEMR before 8.4.0 Privilege Escalation via SMART/OAuth Scope Finalization
published 18d ago modified 2d ago also EUVD-2026-125130 , GHSA-6cmr-r2rh-755m
Unreviewed: the maintainers' own advisory
Published by the maintainers on their GitHub repository openemr/openemr. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.
- cvss
- 7.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 23%
- public exploits
- 0
- none known
Summary
OpenEMR before 8.4.0 contains an improper authorization vulnerability in ScopeRepository::finalizeScopes() that allows read-only SMART/OAuth clients to obtain write scopes because ScopeEntity::containsScope() ignores registered permissions. Attackers with a client registered for user/<resource>.read can request user/<resource>.write to create, update, and delete appointments or patient data.
Patch / fix
- openemr openemr 8.4.0
Is CVE-2026-126494 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
0.30% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-14).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N |
| CNA | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L |
| CNA | 4.0 | 7.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L |
Affected products
- openemr openemr
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/openemr/openemr/security/advisories/GHSA-6cmr-r2rh-755m
vendor-advisory, advisory
-
vulncheck.com
/advisories/openemr-before-8.4.0-privilege-escalation-via-smart-oauth-scope-finalization
third-party-advisory
Sources
- CVE List CVE-2026-126494
- NVD CVE-2026-126494
- Maintainer advisory GHSA-6cmr-r2rh-755m
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
The maintainers of openemr/openemr published their own advisory on GitHub. Reviewed sources take precedence over it.