Critical severity · published Aug 21, 2026
CVE-2026-48753
Incus has an arbitrary file write via path traversal in S3 multipart upload
9.9
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IN
incus · lxc
< 7.1.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-48753
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-48753
github.com
https://github.com/lxc/incus/security/advisories/GHSA-ccjc-4qc3-jxqc
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