EUVD-2026-267509

fkie_cve-2026-25499

Terraform / OpenTofu Provider adds support for Proxmox Virtual Environment. Prior to version 0.93.1, in the SSH configuration documentation, the sudoer line suggested is insecure and can result in escaping the folder using ../, allowing any files on the system to be edited. This issue has been patched in version 0.93.1.

GHSA-gwch-7m8v-7544 — terraform-provider-proxmox has insecure sudo recommendation in the documentation

Affected: Go: github.com/bpg/terraform-provider-proxmox

> Note: It is uncertain whether this constitutes a vulnerability or should be filed as an issue instead.

### Summary

In the SSH configuration documentation, the sudoer line that was suggested can be escalated to edit any files in the system.

### Details

The following line were suggested for addition in the sudoers file:

```bash terraform ALL=(root) NOPASSWD: /usr/bin/tee /var/lib/vz/* ```

But this is highly insecure as the folder can be escaped using `../` and any files can be edited on the system.

### PoC

Using a `terraform` user with the previously mentioned line in the `/etc/sudoers` file, a `/etc/sudoers.d/sudo` file can be added using this command:

`echo "ALL=(ALL) NOPASSWD:ALL" | tee /var/lib/vz/../../../etc/sudoers.d/sudo`

This grants access to the full root of the node.

### Impact

This breaches the access limits of the Terraform user.

### Suggested workaround

Use a strict regex on the command to allow only the names that should be pushed by this user.

Example for cloudinit yaml files:

```bash terraform ALL=(root) NOPASSWD: /usr/bin/tee /var/lib/vz/snippets/[A-Za-z0-9-]*\\.yaml ```

Most recent entries from all

EUVD-2026-267509

fkie_cve-2026-25499

GHSA-gwch-7m8v-7544 — terraform-provider-proxmox has insecure sudo recommendation in the documentation