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CVE-2026-63343

Arbitrary File Read/Write: metadata.yaml symlink in image allows host filesystem access as root PUBLISHED

Description (CNA)

Incus is a system container and virtual machine manager. Prior to version 7.3.0, a malicious image containing a `metadata.yaml` symlink pointing to an arbitrary host path allows an authenticated Incus user to read or overwrite any file on the host as root via the instance metadata API. The `exec-output` and `templates/` paths were patched in a prior release using `Lstat` rejection and `os.OpenRoot` confinement; `metadata.yaml` was not included in either patch and remains exploitable. Version 7.3.0 patches the issue.

Affected (CNA)

Vendor / productVersions
lxc / incusaffected < 7.3.0

CWE

CWE-73

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.