CVE-2026-7657 in Langflow
Summary
by MITRE • 08/05/2026
IBM Langflow OSS 1.0.0 through 1.10.3 Langflow could allow server-side request forgery (SSRF) due to incomplete and ineffective SSRF protection enforcement.
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Analysis
by VulDB Data Team • 08/05/2026
IBM Langflow Open Source Software versions 1.0.0 through 1.10.3 contain a critical server-side request forgery vulnerability that stems from inadequate input validation and incomplete security controls within the application's request handling mechanisms. This vulnerability allows remote attackers to bypass existing SSRF protections by crafting malicious requests that can force the application to make unintended network connections to internal systems or external endpoints. The flaw manifests when the application processes user-supplied URLs or endpoint parameters without proper sanitization, enabling adversaries to manipulate the target of outgoing requests. According to the CWE classification system, this represents a variant of CWE-918 Server-Side Request Forgery, which specifically addresses weaknesses in applications that fail to properly validate and restrict outbound network requests initiated by server-side components.
The technical implementation of this vulnerability occurs within Langflow's request processing pipeline where external URL parameters are not adequately filtered or validated before being used in HTTP client operations. Attackers can exploit this by supplying malicious URLs that point to internal network resources such as localhost, private IP ranges, or other systems that should remain inaccessible from the application's external interface. The vulnerability's impact extends beyond simple information disclosure as it could potentially enable attackers to perform reconnaissance on internal network infrastructure, access sensitive data stored behind firewalls, or even facilitate further attacks through compromised internal services. This weakness aligns with ATT&CK technique T1071.004 Application Layer Protocol: DNS where adversaries may leverage SSRF vulnerabilities to bypass network segmentation controls and access restricted resources.
The operational consequences of this vulnerability are severe for organizations deploying IBM Langflow in production environments, particularly those that handle sensitive data or operate in regulated industries. An attacker who successfully exploits this SSRF flaw could potentially gain access to internal services that are normally protected by network firewalls and security controls. The attack surface is further expanded when considering that Langflow applications may be deployed within containerized environments or cloud platforms where additional network isolation mechanisms exist. Organizations should implement immediate mitigations including comprehensive input validation for all URL parameters, implementing strict allowlists for outbound connections, and deploying network segmentation controls to limit the potential impact of successful exploitation attempts. The vulnerability also highlights the importance of proper security testing during development cycles and demonstrates how incomplete security controls can create persistent risks that may remain undetected for extended periods.
Security teams should prioritize patching affected versions of IBM Langflow to address this SSRF vulnerability, while also implementing monitoring solutions to detect unusual outbound network requests that might indicate exploitation attempts. The mitigation strategy should include network-level controls such as firewall rules that restrict outbound connections from the application servers, and application-level protections that enforce strict validation of all external endpoint references. Organizations should conduct thorough security assessments of their Langflow deployments to identify potential attack vectors and ensure that proper access controls are in place to prevent unauthorized exploitation of this vulnerability. This issue underscores the critical need for robust input validation mechanisms and comprehensive security testing practices throughout the software development lifecycle, particularly when handling network communications and external resource access within application frameworks.