CVE-2026-39911
Auth users can run arbitrary Node.js code via unsandboxed JS in policy.
Is CVE-2026-39911 being exploited?
Not confirmed. CVE-2026-39911 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 0.55% probability of exploitation in the next 30 days.
How severe is CVE-2026-39911?
CVE-2026-39911 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-2026-39911?
Not known from our data. No patch reference has been recorded for CVE-2026-39911, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-39911 affect?
CVE-2026-39911 affects Hashgraph Guardian <= 3.5.0. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-39911?
Apply patch; disable unsandboxed Function() usage; limit privileges.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated RCE via unsandboxed JS; read files, access credentials, forge tokens including admin.
Patch when possible
- affected<= 3.5.1
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.