9.9 Critical

CVE-2026-48755 Incus has an argument injection in backup compression algorithm leading to AFW and ACE

Description

Incus is a system container and virtual machine manager. Prior to version 7.1.0, improper validation of user-provided backup compression algorithm leads to argument injection in the constructed command line. This leads to an arbitrary file write on the host, possibly leading to arbitrary command execution. Version 7.1.0 patches the issue.

CVSS 3.1 detail

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Exploitable remotely over the network, with an ordinary account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector: Network
Attack complexity: Low
Privileges required: Low
Interaction: None
Scope: Changed
Confidentiality: High
Integrity: High
Availability: High

Affected products and versions

Product	Affected versions	Fixed in
incus 7.2	earliest → < 7.2.0	7.2.0
LXD 6.0	6.0.0 → < 6.9.0	6.9.0
LXD 5.1	5.1.0 → < 5.21.5	5.21.5
LXD 5.0	5.0.0 → < 5.0.7	5.0.7
LXD 4.0	4.0.0 → < 4.0.11	4.0.11

References

github.com github.com
github.com github.com

Timeline

Published August 21, 2026
Last modified November 5, 2026

The 47 CVEs of incus →

CVE-2026-115378 Incus before 6.0.7, 6.1.0 before 7.0.2, and 7.1.0 before 7.5.0 contains an arbitrary file write vulnerability in… 6.9 Medium CVE-2026-115377 Incus before 6.0.7, 6.1.0 before 7.0.2, and 7.1.0 before 7.5.0 contains an arbitrary file write vulnerability that… 9.4 Critical CVE-2026-115376 Incus 7.0.1 before 7.0.2 and 7.2.0 before 7.5.0 contains an authorization bypass vulnerability that allows… 8.3 High CVE-2026-115375 Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 Path Traversal via Instance Backup Dependent Volumes 9.4 Critical

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