CVE-2026-71271

Summary

The flaw lies in Memos' webhook URL validation where it fails to check for the unspecified IP address (0.0.0.0/8), potentially allowing unauthorized access. This matters because it can lead to security breaches if exploited.

Exploitability

Exploitation is moderately hard as it requires identifying and leveraging the omission of 0.0.0.0/8 in validation, but preconditions include having knowledge of the system's internal IP handling.

Blast radius

If exploited, this could lead to unauthorized access or manipulation of internal systems through webhooks, with significant impact on data integrity and security.

Prioritized remediation

Update the isReservedIP function to include a check for 0.0.0.0/8 and ensure consistency with other validation functions like isInternalIP.

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.