9.9

CVE-2026-48750: lxc incus External Control of File Name or Path

CVSS: 9.9v3.1CriticalDeferred
AliasesUBUNTU-CVE-2026-48750DEBIAN-CVE-2026-48750GHSA-73hr-m85f-64v9
Published 21-08-2026Last modified 26-08-2026
Open JSON

Vulnerability summary

CVE-2026-48750 is a critical (CVSS 9.9) External Control of File Name or Path 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 · -0.05 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. 26-08-2026
    Last modifiedVulnerability information updated.

Description

Incus is a system container and virtual machine manager. Prior to version 7.2.0, the `record-output` parameter of the `/instances/$name/exec` endpoint stores the output of the command in the `exec-output` directory of the instance. If `exec-output` is a symlink, file named `exec_UUID.stdout` and `exec_UUID.stderr` can be written to an arbitrary location where the `.stdout` file will contain arbitrary content. This behavior can be abused for arbitrary command execution. Version 7.2.0 contains a patch.

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

-0.05 pp

From 0.78% 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

6 links