CVE-2026-23954
Host arbitrary file read/write and RCE via templating in Incus <=6.21.0.
Is CVE-2026-23954 being exploited?
Not confirmed. CVE-2026-23954 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 0.73% probability of exploitation in the next 30 days.
How severe is CVE-2026-23954?
CVE-2026-23954 is rated High with a CVSS score of 8.7. 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-2026-23954?
Yes. A fix has been recorded for CVE-2026-23954. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-23954 affect?
CVE-2026-23954 affects Incus <= 6.21.0, IncusOS. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-23954?
Monitor for patch; upgrade to fixed version when released; restrict trusted images.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Allows attacker to read/write host files and execute commands on the host via crafted image templates.
Monitor only
- affected>= 6.1.0 and <= 6.20.0
- affected<= 6.0.5
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.