HashiCorp, Veeam, and Django patched critical flaws the same week, led by a top-severity bug in HashiCorp's Terraform MCP Server, which connects AI assistants to Terraform. Tracked as CVE-2026-16498 and scored 10.0, it is a cross-tenant flaw in the server's multi-user HTTP mode: its cache looked up clients by session identifier alone, without binding a cached client to the token that created it, so anyone who obtained another user's session ID could run Terraform actions with that user's credential. Only the shared HTTP deployment is affected, not local single-user mode. Veeam separately fixed an unauthenticated console flaw exposing agent credentials, and Django a code-execution bug in spatial queries.
Veeam has patched a critical flaw in Backup and Replication, one of the most widely deployed enterprise backup tools, that lets any authenticated low-privilege domain user run code remotely on the backup server. The bug (CVE-2026-44963, rated 9.4) only affects version 12 installations joined to an Active Directory domain; version 13, which uses a different architecture, is not affected, and workgroup setups are safe. No exploitation has been seen yet, but Veeam warns attackers often move quickly once patches reveal the flaw, and backup servers are a prime ransomware target because compromising them cripples recovery. The fix is build 12.3.2.4854.