CVE-2026-39909
Unauthenticated RCE in llama.cpp RPC GRAPH_RECOMPUTE (use-after-free).
Is CVE-2026-39909 being exploited?
Not confirmed. CVE-2026-39909 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.
How severe is CVE-2026-39909?
CVE-2026-39909 is rated Critical with a CVSS score of 9.2. 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-2026-39909?
Yes. A fix has been recorded for CVE-2026-39909. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-39909 affect?
CVE-2026-39909 affects llama.cpp (versions before b8585), LLM inference servers using llama.cpp RPC, Services exposing GRAPH_RECOMPUTE RPC handler. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-39909?
Update llama.cpp to b8585+ and block/disable RPC exposure until patched
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated remote arbitrary read/write via stored graph reuse, enabling full remote code execution on affected inference servers.
Immediate action required