CVE-2026-48755
Argument injection in Incus backup allows host file write and possible command execution.
Is CVE-2026-48755 being exploited?
Not confirmed. CVE-2026-48755 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.44% probability of exploitation in the next 30 days.
How severe is CVE-2026-48755?
CVE-2026-48755 is rated Critical with a CVSS score of 9.9. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-48755?
Yes. A fix has been recorded for CVE-2026-48755. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-48755 affect?
CVE-2026-48755 affects Incus < 7.1.0, Hosts running Incus (container/VM manager), Linux container/VM hosts. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-48755?
Upgrade to Incus 7.1.0 immediately; restrict backup access and audit for suspicious activity.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
User-supplied backup compression causes argument injection, enabling arbitrary file write on host and potential arbitrary command execution.
Immediate action required
- affected< 7.2.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.