Unauthenticated, network-accessible RCE in Oracle Helidon (Oracle product) enabling full takeover of middleware — high impact across enterprise deployments.
CVE-2026-73912
Unauthenticated RCE in Oracle Helidon 4.5.0 enabling full server takeover via HTTP.
Is CVE-2026-73912 being exploited?
Not confirmed. CVE-2026-73912 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 0.36% probability of exploitation in the next 30 days.
How severe is CVE-2026-73912?
CVE-2026-73912 is rated Critical with a CVSS score of 9.8. 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-2026-73912?
Yes. A fix has been recorded for CVE-2026-73912. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-73912 affect?
CVE-2026-73912 affects Oracle Helidon 4.5.0, Helidon Imperative Web Server, Oracle Fusion Middleware using Helidon. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-73912?
Apply vendor patch when released; meanwhile isolate/block Helidon HTTP and restrict network access.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated RCE over HTTP allows full Helidon process takeover: data theft, integrity loss, service disruption, and potential lateral movement.
Immediate action required
- affected>= 4.0.0 and <= 4.4.1
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.