CVE-2026-33897 in incus

Resumen (Inglés)

Incus is a system container and virtual machine manager. Prior to version 6.23.0, instance template files can be used to cause arbitrary read or writes as root on the host server. Incus allows for pongo2 templates within instances which can be used at various times in the instance lifecycle to template files inside of the instance. This particular implementation of pongo2 within Incus allowed for file read/write but with the expectation that the pongo2 chroot feature would isolate all such access to the instance's filesystem. This was allowed such that a template could theoretically read a file and then generate a new version of said file. Unfortunately the chroot isolation mechanism is entirely skipped by pongo2 leading to easy access to the entire system's filesystem with root privileges. Version 6.23.0 patches the issue.

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Responsable

GitHub_M

Reservar

2026-03-24

Divulgación

2026-03-27

Estado

Confirmado

Voces

VulDB provides additional information and datapoints for this CVE:

ID	Vulnerabilidad	CWE	Exp	Con	CVE
353801	lxc incus Template escalada de privilegios	1336	No está definido	Arreglo oficial	CVE-2026-33897

Fuentes

• MITRE
• NVD
• CVE Details