7.7

CVE-2026-55621: lxc incus Improper Access Control

CVSS: 7.7v3.1HighDeferred
AliasesUBUNTU-CVE-2026-55621DEBIAN-CVE-2026-55621GHSA-64f3-v33m-w89f
Published 21-08-2026Last modified 21-08-2026
Open JSON

Vulnerability summary

CVE-2026-55621 is a high (CVSS 7.7) Improper Access Control vulnerability in lxc incus. EPSS estimates a 0.34% chance of exploitation in the next 30 days, higher than 26% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.7/10
010
High · v3.1 (CVE.org)
EPSS score
0.34%
0%100%
Low · +0.14 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4 · Related 4
OPENSUSE-SU-2026:11651-1OPENSUSE-SU-2026:21812-1SUSE-SU-2026:23692-1SUSE-SU-2026:23712-1

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 7.2.0, missing authorization checks exist for custom volume copying where an attacker knowing the name of a project that they don't have access to and the name of a custom volume in that project can copy the custom volume to a new project. This issue could allow an attacker to access secrets in custom volumes they are not authorized to access. Version 7.2.0 patches the issue.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.34%

Chance of exploitation in the next 30 days

Percentile

26%

Versus all other CVEs

30-day change

+0.14 pp

From 0.20% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.34%

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
  • v6≤ 6.23.0 | All versions (No fix recorded)
  • v7< 7.2.0
Ubuntu2 products
  • incusAll versions (No fix recorded)
  • lxdAll versions (No fix recorded)
Github.com/lxc1 product
  • incus≤ 0.7.0 | All versions (No fix recorded)
Lxc1 product

5 vendors · 8 products

References

9 links