CVE-2026-48750: critical vulnerability in lxc incus
Incus has an arbitrary file write on host via `exec-output` symlink in crafted image
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28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.9epss 0.7%
Incus is a system container and virtual machine manager. Prior to version 7.2.0, the `record-output` parameter of the `/instances/$name/exec` endpoint stores the output of the command in the `exec-output` directory of the instance. If `exec-output` is a symlink, file named `exec_UUID.stdout` and `exec_UUID.stderr` can be written to an arbitrary location where the `.stdout` file will contain arbitrary content. This behavior can be abused for arbitrary command execution. Version 7.2.0 contains a patch.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products
lxc · incusRelated CVEs — lxc incus
In the same product, most dangerous first.
CVE-2026-23954HIGHIncus container image templating arbitrary host file read and writeEPSS 0.8%CVE-2026-48769CRITICALIncus has an arbitrary file write on its client due to trusted image hashEPSS 0.7%CVE-2026-48755CRITICALIncus has an argument injection in backup compression algorithm leading to AFW and ACEEPSS 0.7%CVE-2026-48753CRITICALIncus has an arbitrary file write via path traversal in S3 multipart uploadEPSS 0.7%CVE-2026-48752CRITICALIncus has arbitrary file read+write on host via templates/ symlink in malicious imageEPSS 0.7%CVE-2026-48749CRITICALIncus has an arbitrary file read+write on host via rootfs/ symlink in malicious imageEPSS 0.7%