IBM Langflow OSS 1.0.01.11.5 URL Validation Remote Info Disclosure
CVE-2026-81213 Published on September 10, 2026
Langflow is vulnerable to server-side request forgery due to missing egress validation on server-side URL fetches
IBM Langflow OSS 1.0.0 through 1.11.5 could allow a remote attacker to obtain sensitive information from internal network resources due to improper validation of user-supplied URLs.
Vulnerability Analysis
CVE-2026-81213 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Type
What is a SSRF Vulnerability?
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. By providing URLs to unexpected hosts or ports, attackers can make it appear that the server is sending the request, possibly bypassing access controls such as firewalls that prevent the attackers from accessing the URLs directly. The server can be used as a proxy to conduct port scanning of hosts in internal networks, use other URLs such as that can access documents on the system (using file://), or use other protocols such as gopher:// or tftp://, which may provide greater control over the contents of requests.
CVE-2026-81213 has been classified to as a SSRF vulnerability or weakness.
Products Associated with CVE-2026-81213
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Affected Versions
IBM Langflow OSS:- Version 1.0.0, <= 1.11.5 is affected.