CVE-2026-31070 LalanaChami CVE debrief

Who should care

Teams operating or auditing the LalanaChami Pharmacy Management System codebase, especially anyone exposing the /api/user/signup registration endpoint, should treat this as a high-priority administrative access issue.

Technical summary

The issue is a missing server-side check on the role field in the registration flow. Based on the CVE description and the referenced source location in backend/routes/user.js at commit 5c3d028, the endpoint appears to trust a user-supplied role value instead of enforcing a fixed default or allowlist. NVD maps the weakness to CWE-269 and rates it CVSS 3.1 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), consistent with unauthenticated remote privilege escalation.

Defensive priority

Immediate. This is a network-accessible, unauthenticated path to administrative privilege, so remediation should be prioritized ahead of routine maintenance.

Recommended defensive actions

• Update /api/user/signup so the server ignores any client-supplied role value.
• Default all self-service registrations to the least-privileged account type.
• Add strict allowlist validation and reject unexpected request-body fields at the API boundary.
• Review the affected code path and add regression tests for attempted role escalation during signup.
• Audit existing accounts and recent registrations for unexpected administrative roles.
• Check for similar trust-of-client-input issues in other account creation or role-assignment endpoints.

Evidence notes

The supplied record states that the flaw exists in LalanaChami Pharmacy Management System commit 5c3d028 and that /api/user/signup fails to validate the role parameter. The NVD metadata lists the vulnerability status as Deferred, includes the CVSS vector AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, and assigns CWE-269. The provided references include the project file path backend/routes/user.js#L16 and an additional gist reference from the CVE metadata.

Official resources