Stored XSS in IBM Langflow OSS Playground 1.0.01.11.2
CVE-2026-8447 Published on September 4, 2026
Langflow is vulnerable to stored cross-site scripting and IP spoofing due to unsanitized Markdown rendering and untrusted proxy header trust
IBM Langflow OSS 1.0.0 through 1.11.2 suffer from a stored cross-site scripting vulnerability in the Playground chat interface.
Vulnerability Analysis
CVE-2026-8447 can be exploited with network access, requires 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 small impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2026-8447 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2026-8447
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Affected Versions
IBM Langflow OSS:- Version 1.0.0, <= 1.11.2 is affected.