CVE-2026-48755

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

publishedCWE-20

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.

Technical severity9.9 criticalCVSS 3.1 · CNA: GitHub_M

Published2026-08-21Source updated 2026-11-05

Collected2026-11-063 attributed sources

Fixes and workarounds

Fix

github.com/lxc/incus/v7/cmd/incusd (Go): OSV reports a fixed version 7.2.0. Check the advisory for supported release branches.

Source: OSV GHSA-v6mj-8pf4-hhw4

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
incus lxc	< 7.2.0 (affected)	CNA: GitHub_M
lxd canonical	>= 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)	CNA: GitHub_M
github.com/lxc/incus/v7/cmd/incusd `github.com/lxc/incus/v7/cmd/incusd` Go	≥ 0; < 7.2.0 (affected, semver); OSV events: introduced 0; fixed 7.2.0 Source events (semver) `[ { "introduced": "0" }, { "fixed": "7.2.0" } ]` Other versions: unaffected	OSV GHSA-v6mj-8pf4-hhw4

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 9.9 critical	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`	CNA: GitHub_M

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://github.com/lxc/incus/security/advisories/GHSA-v6mj-8pf4-hhw4CNA: GitHub_M · x_refsource_CONFIRM
https://github.com/canonical/lxd/security/advisories/GHSA-fmc8-p6q7-75ccCNA: GitHub_M · x_refsource_MISC
https://github.com/advisories/GHSA-v6mj-8pf4-hhw4OSV / GitHub Security Advisories · advisory
https://osv.dev/vulnerability/GHSA-v6mj-8pf4-hhw4OSV / GitHub Security Advisories · osv

Prioritization

CISA known exploited vulnerabilities

No KEV listing in collected sources. This does not establish that exploitation is absent.

EPSS

0.73% estimated probability of exploitation in the next 30 days; percentile 54.44.
Assessed 2026-11-05 by FIRST.

SSVC

Exploitation: none
Automatable: no
Technical impact: total

ADP: CISA-ADP · 2026-08-21

Provenance

CNA: GitHub_M
Source updated 2026-11-05
Retrieved 2026-11-06

OSV / GitHub Security Advisories (partial: 1/2 referenced advisories verified)
Source updated 2026-11-05
Retrieved 2026-11-06

FIRST EPSS
Source updated Not reported
Retrieved 2026-11-06

Disclosure revision
c82f3b91657b9ad40f376105689f87f2eadab8a381019435ea0f389cd4c41fa8

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