Act now: CISA added CVE-2026-0770 in Langflow to its Known Exploited Vulnerabilities catalog on July 21, 2026. CISA describes a remote code-execution risk. Teams running Langflow for AI workflows, internal tools, demos, or customer automation should treat exposed installations as an urgent patching and access-review task.
What changed
CISA lists Langflow CVE-2026-0770 with a July 24, 2026 remediation date for affected federal systems. The package advisory identifies versions before 1.9.0 as affected and identifies version 1.9.0 or later as the fixed line. Use a currently maintained Langflow release rather than stopping at the minimum version.
Who should act
- Teams operating Langflow on public cloud, virtual private servers, containers, Kubernetes, or development hosts.
- Agencies and hosting teams that support customer AI builders or automation services.
- Organizations connecting Langflow to model-provider accounts, databases, internal tools, or business automations.
- Owners of temporary demos and proof environments that may still be reachable after a project ended.
Safe patch plan
- Inventory every Langflow deployment and identify the installed version and service owner.
- Move affected installations to Langflow 1.9.0 or later, choosing the current supported release for the deployment method in use.
- Keep the management interface behind authentication and a trusted access layer such as private networking, VPN, SSO, or an approved gateway.
- Limit the service account, connected credentials, and outbound access to what the workflow actually requires.
- After the upgrade, confirm intended sign-in, normal workflow operation, and the reported application version.
Review an exposed installation
If an affected instance was reachable before the upgrade, do more than apply the update. Review user access, saved workflows, integrations, service configuration, process changes, and outbound activity for anything unexpected. Rotate sensitive model-provider, database, cloud, and automation credentials when there is unexplained activity or the exposure cannot be bounded with confidence. Rebuild deployment images so an old Langflow version cannot return during a routine rollback or redeploy.
Hosting and AI operations notes
Langflow often begins as a convenient prototype tool, then gradually gains access to data sources and automation credentials. Treat it as a privileged application: assign an owner, keep a current version inventory, restrict administration access, and remove abandoned demonstrations. Hosting providers and managed-service teams should identify customer-owned instances and communicate the patch requirement without publishing technical attack details.
Related Langflow security guidance
- Langflow CVE-2026-55255 CISA KEV authorization-bypass patch guide
- Langflow CVE-2026-33017 AI workflow security update
- Langflow CVE-2025-3248 CISA KEV ransomware update