Cassandra is widely deployed as a data store; privilege escalation to a superuser role in a database backend could disrupt multiple deployments.
CVE-2026-27314
Cassandra 5.0: CREATE user can hijack a superuser role via ADD IDENTITY in mTLS.
Is CVE-2026-27314 being exploited?
Not confirmed. CVE-2026-27314 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 0.26% probability of exploitation in the next 30 days.
How severe is CVE-2026-27314?
CVE-2026-27314 is rated High with a CVSS score of 8.8. 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-2026-27314?
Yes. A fix has been recorded for CVE-2026-27314. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-27314 affect?
CVE-2026-27314 affects Apache Cassandra 5.0. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-27314?
Upgrade to 5.0.7+
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
CREATE rights allow mapping cert to a superuser role via ADD IDENTITY, granting admin access.
Patch when possible
- affected>= 5.0 and <= 5.0.6
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.