CVE-2026-57966
MediumCVSS 4.4Exploitation Probability (EPSS)
Low risk4th percentile — higher than 4% of all known CVEs
Summary
A path traversal vulnerability was found in spice-vdagent. It allows a malicious or compromised SPICE host to write arbitrary files to any location on the guest operating system. The issue occurs because the filename provided by the SPICE host during file transfers is not properly sanitized.
Risk Assessment
An attacker could overwrite critical system or configuration files on the guest, potentially leading to privilege escalation, code execution, or permanent system damage. The risk is especially high in environments where the SPICE host is not fully trusted.
Recommendation
Update spice-vdagent to the latest patched version immediately. Until the update is applied, restrict trust in SPICE hosts and monitor file transfers.
Original NVD description (English source)
A path traversal vulnerability was found in spice-vdagent. This flaw allows a malicious or compromised SPICE host to write arbitrary files to any location on the guest operating system. This occurs because the filename provided by the SPICE host during file transfers is not properly sanitized before being used. An attacker could exploit this to write to sensitive locations with the privileges of the spice-vdagent process, typically the logged-in user. This issue requires the SPICE host to be untrusted or compromised for exploitation.