Security Digest: March 7, 2026 - 5 Critical Vulnerabilities

Today, we highlight five critical vulnerabilities posing significant risks to systems worldwide. Immediate patching and mitigation efforts are essential...

· 4 min read

Executive Summary

Today, we highlight five critical vulnerabilities posing significant risks to systems worldwide. Immediate patching and mitigation efforts are essential to protect against potential exploits ranging from remote code execution to unauthorized access to sensitive data.

Critical Vulnerabilities

  • CVE-2026-30860: Remote Code Execution in PostgreSQL Applications
    • Impact: Complete system compromise through arbitrary code execution on the database server.
    • Affected Systems: Applications utilizing PostgreSQL array and row expressions without proper SQL injection protections.
    • Immediate Action: Inspect and update the SQL validation logic to handle ArrayExpr and RowExpr.
    • Mitigation: Apply strict SQL validation and disallow dangerous PostgreSQL functions.
  • CVE-2026-30855: Authorization Bypass in WeKnora Tenant Management
    • Impact: Unauthorized access to modify or delete tenant data, enabling account takeovers.
    • Affected Systems: WeKnora application with public account registration enabled.
    • Immediate Action: Implement strict ownership validation on tenant management endpoints.
    • Mitigation: Update API handlers to enforce cross-tenant permissions checks.
  • CVE-2026-30851: Header Injection in Caddy with forward_auth
    • Impact: Privilege escalation by injecting arbitrary headers.
    • Affected Systems: Caddy versions v2.10.0 to v2.11.1.
    • Immediate Action: Apply the patch from Caddy's repository to strip client-supplied headers.
    • Mitigation: Ensure all copy_headers entries are manually stripped.
  • CVE-2026-30859: Cross-Tenant Data Exposure in Database Query Tool
    • Impact: Unauthorized access to sensitive data across tenants.
    • Affected Systems: Applications using WeKnora's database query tool without proper tenant isolation.
    • Immediate Action: Update table isolation logic to include all critical tables.
    • Mitigation: Review and restrict queryable tables to those with enforced tenant isolation.
  • CVE-2026-30858: DNS Rebinding in Web Fetch Tool
    • Impact: Unauthorized access to internal services via DNS rebinding.
    • Affected Systems: Applications utilizing the web_fetch tool without DNS pinning.
    • Immediate Action: Implement DNS pinning to prevent rebinding attacks.
    • Mitigation: Conduct a thorough review of URL handling and validation processes.

Previously Alerted

What to Do Now

  1. Patch all affected systems immediately and verify proper implementation.
  2. Conduct thorough security audits to ensure no exposure remains.
  3. Implement continuous monitoring for suspicious activities.
  4. Update documentation and train staff on new security measures.

Related Resources

  • Internal blog posts on SQL injection prevention and DNS security (forthcoming).
  • Official vendor advisories on Caddy and WeKnora updates.

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