CVE-2026-48753

Incus has an arbitrary file write via path traversal in S3 multipart upload

State: Published
Severity: 9.9 Critical
Published: Aug 21, 2026
Updated: Aug 21, 2026
Reserved: May 22, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	9.9 Critical	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	GitHub_M

Weaknesses

CWE-73 External Control of File Name or Path

Affected Products

Product	Versions
incuslxc	< 7.1.0Affected

References

https://github.com/lxc/incus/security/advisories/GHSA-ccjc-4qc3-jxqc

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