Arbitrary File Write Vulnerability in Incus System Container and VM Manager
CVE-2026-48755

9.9CRITICAL

Key Information:

Vendor

Lxc

Status
Incus
Vendor
CVE Published:
21 August 2026

What is CVE-2026-48755?

Incus, a system container and virtual machine manager, is impacted by an improper validation issue concerning user-specified backup compression algorithms prior to version 7.1.0. This vulnerability allows for argument injection in the command line, enabling an arbitrary file write on the host system. This exploitation could potentially lead to arbitrary command execution, posing a significant security risk. Users are encouraged to update to version 7.1.0 or later to mitigate this vulnerability.

Affected Version(s)

incus < 7.2.0

References

https://github.com/lxc/incus/security/advisories/GHSA-v6m...
x_refsource_CONFIRM

CVSS V3.1

Score:
9.9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.