9.9

CVE-2026-48755: lxc incus Improper Input Validation

CVSS: 9.9v3.1CriticalDeferred
AliasesUBUNTU-CVE-2026-48755DEBIAN-CVE-2026-48755GHSA-v6mj-8pf4-hhw4
Published 21-08-2026Last modified 21-08-2026
Open JSON

Vulnerability summary

CVE-2026-48755 is a critical (CVSS 9.9) Improper Input Validation vulnerability in lxc incus. EPSS estimates a 0.73% chance of exploitation in the next 30 days, higher than 53.5% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.9/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.73%
0%100%
Low · +0.29 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
OPENSUSE-SU-2026:11651-1OPENSUSE-SU-2026:21483-1

Timeline

  1. 21-08-2026
    PublishedVulnerability first disclosed.
  2. 21-08-2026
    Last modifiedVulnerability information updated.

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 metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.73%

Chance of exploitation in the next 30 days

Percentile

54%

Versus all other CVEs

30-day change

+0.29 pp

From 0.44% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.73%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian2 products
  • incus< 6.0.4-2+deb13u8 | < 7.0.0-5
  • lxdAll versions (No fix recorded) | < 5.0.2+git20231211.1364ae4-9+deb13u7
Github.com/lxc/incus2 products
  • v6All versions (No fix recorded)
  • v7< 7.2.0
Ubuntu2 products
  • incusAll versions (No fix recorded)
  • lxdAll versions (No fix recorded)
Github.com/lxc1 product
  • incusAll versions (No fix recorded)
Github.com/lxc/incus/v7/cmd1 product
  • incusd< 7.2.0
Lxc1 product

6 vendors · 9 products

References

7 links