CVE-2026-48753

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

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.

Affected

lxc · incus

CVSS v3.1 GITHUB

9.9 CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS

0.73% chance of exploitation in the next 30 days, 53rd percentile

Published

2026-08-21

Proof-of-concept exploits (1)

• advisories/GHSA-ccjc-4qc3-jxqc

References

• CVE Record
• NVD entry