What is CVE-2026-48753?

CVE-2026-48753 is a critical-severity vulnerability in Lxc Incus, classified under External Control of File Name or Path. CVSS score: 9.9/10. Published 2026-08-21.

How severe is CVE-2026-48753?

Critical severity. CVSS v3 base score is 9.9 out of 10.

Vulnerability in Lxc Incus

CVE-2026-48753

Incus is a system container and virtual machine manager. Prior to version 7.1.0, the S3 protocol upload endpoint is vulnerable to path traversal and allows creation of arbitrary files on the host. This behavior could lead to arbitrary command execution. Version 7.1.0 fixes the issue.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Lxc Incus — versions < 7.1.0

Weakness classification (CWE)

CWE-73 — External Control of File Name or Path

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-48753?: CVE-2026-48753 is a critical-severity vulnerability in Lxc Incus, classified under External Control of File Name or Path. CVSS score: 9.9/10. Published 2026-08-21.
How severe is CVE-2026-48753?: Critical severity. CVSS v3 base score is 9.9 out of 10.