CVE-2026-8183 in Langflow OSS
Summary
by MITRE • 08/05/2026
IBM Langflow OSS 1.0.0 through 1.10.3, 1.0.0 through 1.10.3, 1.0.0 through 1.10.3, 1.0.0 through 1.10.3, 1.0.0 through 1.10.3, and 1.0.0 through 1.10.3 could allow a remote attacker to traverse directories on the system. An attacker could send a specially crafted URL request containing "dot dot " sequences ( /.. /) to v i ew arbitrary files on the system.
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Analysis
by VulDB Data Team • 08/05/2026
This vulnerability exists in IBM Langflow Open Source Software versions 1.0.0 through 1.10.3, representing a classic directory traversal flaw that enables remote attackers to access arbitrary files on the affected system. The vulnerability stems from insufficient input validation within the application's URL handling mechanism, where specially crafted requests containing dot-dot-sequence patterns can be exploited to navigate beyond the intended directory structure. This type of vulnerability falls under CWE-22 Directory Traversal and aligns with ATT&CK technique T1083 File and Directory Discovery, as it allows adversaries to explore system file structures without proper authorization.
The technical implementation of this flaw occurs when the application fails to properly sanitize or validate user-supplied URL parameters before processing them. When an attacker submits a request containing sequences such as "/../" or "%2e%2e%2f", the application interprets these patterns as legitimate navigation commands rather than malicious input, resulting in unauthorized access to files outside the designated web root directory. This vulnerability specifically affects the file viewing functionality of the Langflow platform, potentially exposing sensitive configuration files, source code, database credentials, and other confidential information stored on the server.
The operational impact of this vulnerability is significant as it provides attackers with unrestricted access to the underlying file system, potentially leading to complete system compromise. An attacker could leverage this vulnerability to read critical system files, access application configuration data, retrieve database connection strings, or even obtain source code repositories that may contain additional security flaws. The remote nature of this attack means that exploitation does not require physical access to the system, making it particularly dangerous for publicly accessible installations. This vulnerability also supports broader attack patterns including credential theft, privilege escalation, and lateral movement within network environments.
Mitigation strategies should focus on implementing robust input validation and sanitization mechanisms throughout the application's request processing pipeline. The most effective immediate solution involves implementing proper path normalization and validation that rejects or removes any directory traversal sequences from user-supplied inputs. Organizations should also consider implementing web application firewalls with specific rules to detect and block suspicious URL patterns containing dot-dot sequences. Additionally, applying the principle of least privilege by restricting file system permissions for the application process can limit the damage potential even if exploitation occurs. Regular security updates and patch management procedures should be implemented to ensure all known vulnerabilities are addressed promptly, as this vulnerability affects multiple versions within the specified release ranges and represents a persistent risk that requires continuous monitoring and remediation efforts.