CVE-2026-82470 jeremyevans CVE debrief

Who should care

Users of Rodauth versions before 2.47.0 should be aware of this vulnerability and take steps to mitigate it. This includes administrators and security teams responsible for Rodauth deployments, as well as developers who integrate Rodauth into their applications. Vulnerability management and security teams should review and prioritize patching or mitigation efforts based on their organization's risk assessment and exposure to Rodauth implementations using TOTP for two-factor authentication. Additionally, operators and platform administrators should be aware of the potential impact on their systems and take appropriate measures to protect against exploitation. Security teams should also monitor for suspicious authentication attempts and implement compensating controls where necessary. Furthermore, asset inventory managers should verify Rodauth version deployments and prioritize patching or mitigation efforts accordingly. Rollback/change window planning should also be considered to minimize potential disruptions. Source tracking and monitoring can help identify potential exploitation attempts. Overall, a coordinated effort is required to address this vulnerability effectively across affected organizations and systems. The CVSS score of 5.1 indicates a medium severity level, emphasizing the need for prompt attention and mitigation to prevent potential security breaches. By taking proactive steps, organizations can reduce the risk associated with this vulnerability and protect their Rodauth deployments from potential exploitation. It is essential to stay informed about the vulnerability and its potential impact to ensure the security and integrity of Rodauth-based systems and applications. Effective communication and collaboration among stakeholders are crucial to addressing this vulnerability and maintaining the security posture of affected organizations. In summary, a broad range of stakeholders, including administrators, security teams, developers, operators, and platform administrators, should be aware of this vulnerability and take appropriate measures to mitigate its impact on their Rodauth deployments and overall security posture. The vulnerability's potential

Technical summary

Rodauth before 2.47.0 contains a time-based one-time password reuse vulnerability in the otp feature. The vulnerability fails to track the last accepted code timestamp, allowing attackers who observe a valid TOTP code to replay it during the drift window to bypass the second authentication factor. This issue affects Rodauth deployments using TOTP for two-factor authentication. To mitigate this vulnerability, users should upgrade to Rodauth 2.47.0 or later. In the meantime, defenders should verify Rodauth version, review authentication logs, and monitor for suspicious activity. Compensating controls for TOTP and exception tracking for authentication events can also be implemented to reduce the risk associated with this vulnerability.

Defensive priority

Medium priority given the CVSS score of 5.1 and the potential for attackers to bypass the second authentication factor.

Recommended defensive actions

• Inventory and verify Rodauth version
• Apply patch or upgrade to Rodauth 2.47.0 or later
• Monitor for suspicious authentication attempts
• Implement compensating controls for TOTP
• Exception tracking for authentication events

Evidence notes

Evidence is limited; primary official records indicate a time-based one-time password reuse vulnerability in Rodauth before 2.47.0. The CVE description states that attackers who observe a valid TOTP code can replay it during the drift window to bypass the second authentication factor. Defenders should verify Rodauth version, review authentication logs, and monitor for suspicious activity.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.