CVE-2026-70477
Flowise CSV Agent prompt injection allows arbitrary Python execution (pre-3.1.3).
Is CVE-2026-70477 being exploited?
Not confirmed. CVE-2026-70477 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 0.83% probability of exploitation in the next 30 days.
How severe is CVE-2026-70477?
CVE-2026-70477 is rated Critical with a CVSS score of 9.5. 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-2026-70477?
Yes. A fix has been recorded for CVE-2026-70477. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-70477 affect?
CVE-2026-70477 affects Flowise < 3.1.3, Flowise CSV Agent node, Pyodide runtime in Flowise. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-70477?
Upgrade to Flowise 3.1.3+; disable CSV Agent on public instances and audit flows.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote arbitrary code execution in unsandboxed Pyodide via CSV Agent prompt injection, runs as the service account.
Immediate action required
- affected< 3.1.2
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.