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CVE-2026-9198

IBM Langflow•CRITICAL · CVSS 9.8• In the wild In CISA KEV

What is CVE-2026-9198?

IBM Langflow OSS 1.0.0 through 1.10.0 allows unauthenticated attackers to chain /api/v1/auto_login (mints SUPERUSER tokens to any network caller) with /api/v1/validate/code (executes user code via exec()) to achieve full RCE on default Langflow deployments

CVSS9.8 NVD 3.1

SeverityCRITICAL

Exploitation In the wild In CISA KEV

EPSS29% · P98

Triage statusActive Exploit

ActionPatch immediately

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWECWE-94

NVD published2026-07-17

NVD last modified2026-10-24

Timeline

2026-07-17Published to the U.S. National Vulnerability Database (NVD)
2026-08-04Added to the CISA Known Exploited Vulnerabilities (KEV) catalog
2026-08-06First covered in a defend.network daily briefing
2026-08-07CISA federal remediation deadline (BOD 22-01)
2026-10-24NVD record last updated

CISA Known Exploited Vulnerability

IBM Langflow Code Injection Vulnerability

Added to KEV2026-08-04

Federal patch deadline2026-08-07

Known ransomware useUnknown

Affected product

IBM Langflow

Remediation Steps

Consult CISA Known Exploited Vulnerabilities catalog for affected product details
Identify affected systems in your environment
Apply vendor patch as soon as available
Verify patch installation across all instances

References

Referenced in our briefings & reports

Vulnerability Priority Report – Week 5 of August 2026 (August 31 – September 6)
Vulnerability Priority Report – Week 4 of August 2026 (August 24 – 30)
Vulnerability Priority Report – Week 3 of August 2026 (August 17 – 23)
Vulnerability Priority Report – Week 2 of August 2026 (August 10 – 16)
Vulnerability Priority Report – Week 1 of August 2026 (August 3 – 9)
Linux KVM escape, Cisco SD-WAN patches, Spectre v2 defenses bypassed (2026-08-07)
IBM Langflow, Apache Tomcat, N-able RCE and auth bypass actively exploited (2026-08-06)

Related vulnerabilities

CVE-2026-33017 – Langflow (same product)
CVE-2026-0768 – Langflow (same product)
CVE-2026-55255 – Langflow (same product)
CVE-2026-5027 – Langflow (same product)
CVE-2026-0770 – Langflow (same product)
CVE-2026-0322 – Palo Alto Networks PAN-OS (same weakness: CWE-94)

Browse all tracked CVEs in the defend.network CVE database →

🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.