What’s Vulnerable › Vulnerabilities

CVE-2026-48750: Incus has an arbitrary file write on host via `exec-output` symlink in crafted image

• Severity: critical (CVSS 9.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-21 · updated 2026-10-15
• Weakness: CWE-73

Description

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.

Affected products

• lxc incus: before 7.2.0

References

• https://github.com/lxc/incus/security/advisories/GHSA-73hr-m85f-64v9
• https://github.com/lxc/incus/security/advisories/GHSA-73hr-m85f-64v9

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