PYSEC-2026-2569
Langflow vulnerable to injection
At a glance
- Published
- Updated
- CVE
- CVE-2026-6599
- Aliases
- GHSA-v66p-f7x3-4794
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
- CVSS_V4
- CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Description
A vulnerability was detected in langflow-ai langflow up to 1.8.3. The impacted element is the function get_client_ip/install_mcp_config of the file src/backend/base/langflow/api/v1/mcp_projects.py of the component Model Context Protocol Configuration API. Performing a manipulation of the argument X-Forwarded-For results in injection. The attack may be initiated remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Affected packages
| Package | Versions |
|---|---|
| PyPI · langflow | introduced 0, last affected 1.8.3 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-6599 ADVISORY
- https://gist.github.com/chenhouser2025/a909c47316b7a0948ee68c109ab747a3 WEB
- https://github.com/langflow-ai/langflow PACKAGE
- https://vuldb.com/submit/791922 WEB
- https://vuldb.com/vuln/358234 WEB
- https://vuldb.com/vuln/358234/cti WEB
- https://pypi.org/project/langflow PACKAGE
- https://github.com/advisories/GHSA-v66p-f7x3-4794 ADVISORY
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — PyPA Advisory Database |