Langflow Authentication Bypass Enables Arbitrary Code Execution

IBM Langflow OSS 1.0.0 through 1.9.3 has an vulnerability due to an improper isolation of Python execution combined with an authentication bypass that allows an unauthenticated attacker to execute arbitrary code on the host system, resulting in complete compromise

Casky was already ahead

This CVE exploits attack patterns that Casky's 322matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.

Analysis

IBM Langflow OSS versions 1.0.0 through 1.9.3 contain a critical vulnerability combining improper Python execution isolation with an authentication bypass mechanism. This allows completely unauthenticated attackers to execute arbitrary code directly on the host system, resulting in full compromise. Organizations deploying Langflow as part of AI/ML pipelines—particularly those exposed to untrusted networks or internet-facing instances—face immediate risk of data theft, lateral movement, and infrastructure takeover. The severity is compounded by Langflow's typical role in handling sensitive workflows and integrations.

Casky's 322 mapped skills leverage Claude's extended reasoning to detect the attack chain across MITRE ATT&CK techniques TA0001 (Initial Access) and TA0043 (Reconnaissance). Practitioners using Casky would identify reconnaissance patterns preceding exploitation (network scanning, version fingerprinting of Langflow instances), followed by detection of unauthenticated API requests attempting to trigger the Python execution sandbox escape. The platform's skills would flag suspicious payload patterns typical of code injection attacks (CWE-94), trace execution flows that bypass authentication controls, and correlate indicators of post-exploitation activity such as process spawning, file system access, or outbound connections. Real-time analysis would surface these attack progressions in a practitioner's findings dashboard, enabling rapid containment before the vulnerability chain reaches code execution.

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Casky Risk Score

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EPSS Probability

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Shodan Exposure

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GreyNoise Signal

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Composite risk scoring from EPSS, CISA KEV, Shodan, and GreyNoise — 21 security APIs correlated into a single Casky Risk Score. Coming in Casky Pro. Join early access →

322 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-10561.

Abuse of Public-Facing API: Mobile API Abuse

mobile security · low

Run

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

MITRE ATT&CK Techniques

TA0001 TA0043

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