Exploited CVEs / Langflow / CVE-2025-3248
CVE-2025-3248
Langflow Missing Authentication Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted, and the vulnerability is known to be used in ransomware campaigns. Federal agencies were required to remediate by 2025-05-26 (that deadline has passed); treat that date as the outer bound for your own environment. Check the vendor security advisory for the fix.
Actively exploited Langflow vulnerability, Critical severity, CVSS 9.8. Added to the CISA KEV catalog 2025-05-05.
Risk summary
Updated August 1, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2025-3248
CVE-2025-3248 lets an unauthenticated attacker send crafted HTTP requests to Langflow's /api/v1/validate/code endpoint and run arbitrary code, meaning any Langflow instance reachable without a login is fully exposed. It carries Critical Severity (CVSS 9.8), sits on the CISA KEV list since 2025-05-05, and is being used in ransomware campaigns with a 100 percent EPSS exploit probability. If your team stood up Langflow for AI workflow prototyping and left it internet-facing, treat it as already targeted.
Do this: Identify every Langflow deployment, pull it off the public internet or block access to /api/v1/validate/code, and patch to a fixed version today.
AI-generated from public data, 2026-07-22. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2025-3248
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2025-3248
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
CISA required action
Federal (BOD 22-01) remediation due date: 2025-05-26 (past due).
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Official fix for CVE-2025-3248
Check the vendor's security advisory channel for the patched Langflow versions and workarounds.
Common questions about CVE-2025-3248
Is CVE-2025-3248 actively exploited?
Yes. CVE-2025-3248 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2025-05-05, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 100%. CISA also reports it is known to be used in ransomware campaigns.
What is the CISA deadline and required action for CVE-2025-3248?
CISA set the federal (BOD 22-01) remediation due date at 2025-05-26, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
What fixes CVE-2025-3248?
Check the vendor's security advisory for the patched Langflow versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.
Can I ask my own AI about CVE-2025-3248?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2025-3248's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (5 AM and 3 PM US Central).
More exploited Langflow CVEs
The newest Langflow entries on the CISA KEV catalog:
All Langflow exploited CVEs on one page: Langflow vulnerabilities actively exploited.
Authoritative references
Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.
