CVE-2026-18545

Analyzed Analyzed - Analysis Complete

IBM Langflow SSRF Vulnerability in OSS 1.0.0 to 1.11.1

Publication date: 2026-08-28

Last updated on: 2026-08-31

Assigner: IBM Corporation

Description

IBM Langflow OSS 1.0.0 through 1.11.1 is vulnerable to server-side request forgery (SSRF). This may allow an authenticated attacker to send unauthorized requests from the system, potentially leading to network enumeration or facilitating other attacks.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-28

Last Modified

2026-08-31

Generated

2026-09-18

AI Q&A

2026-08-29

EPSS Evaluated

2026-09-15

NVD

CVE-2026-18545

EUVD

EUVD-2026-67951

Affected Vendors & Products

Vendor	Product	Version / Range
langflow	langflow	From 1.0.0 (inc) to 1.11.2 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-918	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.

Attack-Flow Graph

Executive Summary

IBM Langflow OSS versions 1.0.0 through 1.11.1 have a server-side request forgery (SSRF) vulnerability. This flaw allows authenticated attackers to send unauthorized requests from the affected system, potentially enabling network scanning or other malicious activities.

Detection Guidance

Detecting SSRF vulnerabilities like CVE-2026-18545 requires monitoring network traffic and application behavior. Check for unusual outbound requests from your Langflow instance, especially to internal or restricted IP ranges. Use network monitoring tools like tcpdump or Wireshark to capture outgoing traffic. Inspect application logs for unexpected HTTP requests or errors related to external connections.

Impact Analysis

An attacker could exploit this to access internal systems, perform reconnaissance on your network, or use your server as a proxy to launch further attacks. This may lead to data breaches or unauthorized access to sensitive resources.

Compliance Impact

SSRF vulnerabilities can violate compliance requirements by exposing sensitive data or systems to unauthorized access. This may result in penalties under GDPR for data breaches or HIPAA violations for compromised health information.

Mitigation Strategies

Update IBM Langflow OSS to a version beyond 1.11.1 to address the SSRF vulnerability. If immediate update is not possible, restrict network access to the Langflow instance and monitor for unauthorized requests.

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