CVE-2026-48753
Path traversal in Incus S3 upload allows host file creation and possible command execution.
Is CVE-2026-48753 being exploited?
Not confirmed. CVE-2026-48753 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 0.71% probability of exploitation in the next 30 days.
How severe is CVE-2026-48753?
CVE-2026-48753 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-2026-48753?
Yes. A fix has been recorded for CVE-2026-48753. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-48753 affect?
CVE-2026-48753 affects Incus (system container & VM manager) prior to 7.1.0, Incus S3 upload endpoint. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-48753?
Upgrade Incus to 7.1.0 immediately; block S3 upload endpoint until patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Path traversal via S3 upload lets attacker write arbitrary host files, enabling arbitrary command execution and full host compromise.
Immediate action required
- affected< 7.1.0
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.