CVE-2026-126436

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Source
https://cve.org/CVERecord?id=CVE-2026-126436
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-126436.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-126436
Aliases
  • GHSA-qjj7-c4m9-6f92
Published
2026-11-13T09:35:22Z
Modified
2026-11-14T10:31:04Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
OpenEMR before 8.5.0 OAuth2 Grant Type Enforcement Bypass via Token Endpoint
Details

OpenEMR before 8.5.0 contains an authorization bypass vulnerability that allows OAuth2 clients to use unregistered grant types because oauth_clients.grant_types is never enforced. Attackers can request tokens with grant_type=password to bypass the user consent screen, and disabled clients can redeem authorization codes using JWT client assertions.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126436.json"
}
References

Affected packages

Git / github.com/openemr/openemr

Affected ranges

Type
GIT
Repo
https://github.com/openemr/openemr
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
c1b2b8bcbe91aa81858f7ba8b25c31d9a82639a5
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "8.5.0"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        }
    ]
}

Affected versions

Other
v2_7_2
v2_7_2-rc1
v2_7_2-rc2
v2_7_3-rc1
v2_8_0
v2_8_1
v2_8_2
v2_8_3
v2_9_0
v3_0_0
v3_0_1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-126436.json"