CVE-2026-57966
MediumCVSS 4.4Exploitation Probability (EPSS)
Low risk2th percentile - higher than 2% of all known CVEs
Summary
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, as the filename provided by the host is not properly sanitized before use.
Risk Assessment
An attacker can write malicious files to sensitive locations on the guest system, potentially leading to privilege escalation, arbitrary code execution, or persistent system compromise. The risk is especially high in environments where the SPICE host is not fully trusted.
Recommendation
Immediately update spice-vdagent to a patched version. Until then, restrict trust to SPICE hosts and monitor file transfers.
Other vulnerabilities in spice-vdagent
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS