CVE-2026-48753: Incus has an arbitrary file write via path traversal in S3 multipart upload

June 26, 2026

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.

References

github.com/advisories/GHSA-ccjc-4qc3-jxqc
github.com/lxc/incus/security/advisories/GHSA-ccjc-4qc3-jxqc
nvd.nist.gov/vuln/detail/CVE-2026-48753

Code Behaviors & Features

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