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High severityNVD Advisory· Published Feb 4, 2026· Updated Feb 5, 2026

terraform-provider-proxmox has insecure sudo recommendation in the documentation

CVE-2026-25499

Description

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.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
github.com/bpg/terraform-provider-proxmoxGo
< 0.93.10.93.1

Affected products

1

Patches

1
bd604c41a31e

fix(docs): prevent path traversal in sudoers tee configuration (#2524)

https://github.com/bpg/terraform-provider-proxmoxPavel BoldyrevJan 31, 2026via ghsa
commit
3 files changed · +7 −3
  • .dev/__pycache__/proxmox_debug_script.cpython-314.pyc+0 −0 removed
  • docs/index.md+5 −3 modified
    @@ -422,17 +422,19 @@ In the example below, we create a user `terraform` and assign the `sudo` privile
     ```text
     terraform ALL=(root) NOPASSWD: /usr/sbin/pvesm
     terraform ALL=(root) NOPASSWD: /usr/sbin/qm
-    terraform ALL=(root) NOPASSWD: /usr/bin/tee /var/lib/vz/*
+    terraform ALL=(root) NOPASSWD: /usr/bin/tee /var/lib/vz/snippets/[a-zA-Z0-9_][a-zA-Z0-9_.-]*
     ```
 
   If you're using a different datastore for snippets, not the default `local`, you should add the datastore's mount point to the sudoers file as well, for example:
-  
+
     ```text
-    terraform ALL=(root) NOPASSWD: /usr/bin/tee /mnt/pve/cephfs/*
+    terraform ALL=(root) NOPASSWD: /usr/bin/tee /mnt/pve/cephfs/snippets/[a-zA-Z0-9_][a-zA-Z0-9_.-]*
     ```
 
   You can find the mount point of the datastore by running `pvesh get /storage/<name>` on the Proxmox node.
 
+  ~> **Security Warning:** Do not use wildcard patterns like `/var/lib/vz/*` in sudoers rules for `tee`. Such patterns allow path traversal attacks (e.g., `/var/lib/vz/../../../etc/sudoers.d/malicious`) that can lead to privilege escalation. Always restrict to specific subdirectories with strict filename patterns as shown above.
+
 - Copy your SSH public key to the `~/.ssh/authorized_keys` file of the `terraform` user on the target node.
 
 - Test the SSH connection and password-less `sudo`:
  • .gitignore+2 −0 modified
    @@ -1,6 +1,8 @@
 /example/terraform-provider-*
 /pkg/
 /test/
+/tmp/
+/temp/
 /website/.vagrant
 /website/.bundle
 /website/build

Vulnerability mechanics

Generated by null/stub on May 9, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.

References

4

News mentions

0

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