CVE-2026-48755

Incus has an argument injection in backup compression algorithm leading to AFW and ACE

Critical9.9EPSS 0.78%

Published: 21 Aug 2026
Updated: 5 Nov 2026
Reserved: 22 May 2026
Assigned by: GitHub_M

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.

Scores

CVSS scores of CVE-2026-48755, by who scored it
Scored by	CVSS	Score	Vector
GitHub_MCNA (assigner)	3.1	Critical9.9	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
NVDNVD · Deferred	3.1	Critical9.9	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS (exploitation in 30 days): 0.78% · top 44% of all CVEs (7 Nov 2026)
CISA SSVC: Exploitation: none · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.9.

Weakness

CWE-20: Improper Input Validation (opens in a new tab)All about CWE-20 and its CVEs

Affected products

lxc · incus
- affected < 7.2.0
canonical · lxd
- affected >= 4.0.0, < 4.0.11
- affected >= 5.0.0, < 5.0.7
- affected >= 5.1.0, < 5.21.5
- affected >= 6.0.0, < 6.9.0

Affected packages

From reviewed advisories of the GitHub Advisory Database.

Gogithub.com/lxc/incus/v7/cmd/incusdGHSA-v6mj-8pf4-hhw4 (opens in a new tab)

References (2)

https://github.com/lxc/incus/security/advisories/GHSA-v6mj-8pf4-hhw4 (opens in a new tab)x_refsource_CONFIRM
https://github.com/canonical/lxd/security/advisories/GHSA-fmc8-p6q7-75cc (opens in a new tab)x_refsource_MISC

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

[![CVE-2026-48755](https://trackcve.app/badge/CVE-2026-48755.svg)](https://trackcve.app/cve/CVE-2026-48755)

Record last updated 5 Nov 2026, 23:36 UTC.