host file exfiltration

About this tag
Host file exfiltration refers to techniques that allow a guest virtual machine to read sensitive files from the host system. A recent example is CVE-2026-27211, a high-severity information-disclosure flaw in Cloud Hypervisor, a Rust-based VMM used in cloud and edge projects. The vulnerability involves a crafted VM disk header that tricks the guest into reading host files, such as SSH keys and configuration files. This issue highlights how image-format parsing problems can resurface in modern cloud stacks. Discussions on WindowsForum cover the technical details of such attacks, their impact on cloud security, and mitigation strategies for administrators managing hypervisor environments.

  1. CVE-2026-27211: VM Disk Header Trick Exposes Host Files in Cloud Hypervisor

    A crafty alteration to a VM disk header can make a guest VM read sensitive host files — that is the practical risk discovered in CVE-2026-27211, a high‑severity information‑disclosure flaw in Cloud Hypervisor that reintroduces a long‑standing class of image‑format parsing problems into modern...
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    • Forum: Security Alerts