CVE-2026-113386 Roundcube CVE debrief

Who should care

Defenders responsible for Roundcube Webmail installations should assess exposure and prioritize remediation efforts. This includes operators managing affected Roundcube Webmail versions, platform administrators, vulnerability management teams, and security teams. These stakeholders must verify exposure for versions before 1.6.20 and 1.7.x before 1.7.5 and plan for remediation or mitigation as needed. The potential security risks associated with this CVE 7

Why it matters

CVE-2026-113386 is a security vulnerability in Roundcube Webmail that requires verification of exposure and remediation for affected versions.

• Verification of exposure for Roundcube Webmail versions before 1.6.20 and 1.7.x before 1.7.5 is required
• Potential security risks may exist for affected Roundcube Webmail installations
• Remediation priority is high for affected systems

Technical summary

A security vulnerability was found in Roundcube Webmail versions before 1.6.20 and 1.7.x before 1.7.5. The CVE record and vendor source provide limited information on the vulnerability's impact and remediation. Defenders should prioritize verification of exposure and remediation for affected installations. The vulnerability's technical details and potential impact on affected systems require further investigation and source-grounded analysis to understand its full scope and implications for defenders. This includes assessing potential security risks and necessary remediation steps.

Defensive priority

Defenders should prioritize verification of exposure and remediation for Roundcube Webmail versions before 1.6.20 and 1.7.x before 1.7.5.

Recommended defensive actions

• Verify Roundcube Webmail version and update to 1.6.20 or later, or 1.7.5 or later if applicable
• Review system inventory for affected Roundcube Webmail installations
• Monitor system logs for potential exploitation attempts
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and vendor source provide limited information on the vulnerability's impact and remediation. Further verification is required to determine the vulnerability's effects. Defenders should verify exposure for Roundcube Webmail versions before 1.6.20 and 1.7.x before 1.7.5. The official CVE Program record and NIST NVD detail page offer additional information. However, the full scope and potential impact of the vulnerability remain unclear without additional source context.

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.