OpenEMR up to 8.4.x TOTP main_screen.php excessive authentication

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.22+

Summaryinfo

A vulnerability was found in OpenEMR up to 8.4.x. It has been classified as problematic. Affected by this issue is some unknown functionality of the file main_screen.php of the component TOTP. Performing a manipulation results in excessive authentication. This vulnerability was named CVE-2026-126454. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in OpenEMR up to 8.4.x. This affects an unknown code block of the file main_screen.php of the component TOTP. The manipulation with an unknown input leads to a excessive authentication vulnerability. CWE is classifying the issue as CWE-307. The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame. This is going to have an impact on confidentiality. The summary by CVE is:

OpenEMR before 8.5.0 lacks rate limiting or lockout on TOTP submission, allowing attackers with a valid password to brute-force the 6-digit MFA code. Attackers can script repeated POST requests to main_screen.php or the OAuth2 authorization flow with re-submitted hidden credentials to bypass two-factor authentication.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-126454 since 11/10/2026. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1110.001 for this issue.

By approaching the search of inurl:main_screen.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 8.5.0 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.1
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Excessive authentication
CWE: CWE-307 / CWE-799 / CWE-400
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Google Hack: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: OpenEMR 8.5.0

Timelineinfo

11/10/2026 CVE reserved
11/13/2026 +3 days Advisory disclosed
11/13/2026 +0 days VulDB entry created
11/13/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CNA: VulnCheck
CVE: CVE-2026-126454 (🔒)

GCVE (CVE): GCVE-0-2026-126454
GCVE (VulDB): GCVE-100-436833

Entryinfo

Created: 11/13/2026 11:39
Changes: 11/13/2026 11:39 (77)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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