CVE-2026-126421

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Source
https://cve.org/CVERecord?id=CVE-2026-126421
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-126421.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-126421
Aliases
  • GHSA-3j3r-w7q7-h9fj
Published
2026-11-13T09:35:33Z
Modified
2026-11-14T02:47:28Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
OpenEMR before 8.5.0 Denial of Service via labs_ajax.php Label Count
Details

OpenEMR before 8.5.0 contains an uncontrolled resource consumption vulnerability that allows authenticated users with patients/med access to exhaust PHP workers via an unbounded count parameter. Attackers can send print_labels requests to labs_ajax.php with huge counts, forcing mPDF page and barcode generation that makes OpenEMR unavailable.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126421.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-2026-126421.json"