CVE-2026-8447
Langflow is vulnerable to stored cross-site scripting and IP spoofing due to unsanitized Markdown rendering and untrusted proxy header trust
CVSS Score
6.1
EPSS Score
0.0%
EPSS Percentile
0th
IBM Langflow OSS 1.0.0 through 1.11.2 suffer from a stored cross-site scripting vulnerability in the Playground chat interface.
| CWE | CWE-79 |
| Vendor | ibm |
| Product | langflow oss |
| Published | Sep 4, 2026 |
| Last Updated | Sep 4, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
IBM / Langflow OSS
1.0.0 ≤ 1.11.2
Credits
odgrso GMO CyberSecurity by Ierae inc, Edward-x (YLChen-007)