CVE-2026-9198
Unauthenticated Remote Code Execution via Auto-Login Bypass and Code Validation
Description
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
In plain language
AI Act nowCVE-2026-9198 is a critical, no-login remote code execution flaw in IBM Langflow OSS that is actively being exploited on default, publicly reachable setups—if your Langflow is reachable from the internet, you should treat this as urgent and upgrade.
CVE-2026-9198 enables unauthenticated remote code execution in IBM Langflow OSS by abusing an auto-login bypass to mint SUPERUSER access, then using weak code validation to execute attacker-supplied code on default network-reachable deployments.
What to do now
- Check whether your IBM Langflow OSS deployment is reachable from the network without authentication (default deployments are considered risky if publicly accessible).
- Check your current Langflow OSS version; confirm whether it is in 1.0.0 through 1.10.0.
- Upgrade Langflow OSS to 1.10.1 (fixed) as soon as possible.
- If you cannot upgrade immediately, block all internet access to the Langflow instance (allow only required internal IPs/VPN) until mitigations can be applied.
pip install --upgrade langflow==1.10.1CVSS Vector Breakdown
AV:NAttack VectorAC:LAttack ComplexityPR:NPrivileges RequiredUI:NUser InteractionS:UScopeC:HConfidentialityI:HIntegrityA:HAvailabilityWeaknesses
Affected Products
Exploitability
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Attack Graph
Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.
MITRE ATT&CK
2 techniquesReferences
- Critical Langflow flaw exploited to steal OpenAI and AWS keysen-us·BleepingComputer· Exploited Langflow rce
- CISA warns of hackers exploiting Langflow, N-central, Apache Tomcat flawsen-us·BleepingComputer· Exploited Langflow ai-ml
- CISA Warns of Exploited Langflow, N-central, and Tomcat Vulnerabilitiesen-us·SecurityWeek· Exploited Langflow web-app
- CISA Flags Langflow RCE, Tomcat, and N-central Flaws as Actively Exploiteden·The Hacker News· Exploited Langflow knaithe
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