CVE-2026-6599langflow-ai langflow Model Context Protocol Configuration API mcp_projects.py install_mcp_config injection
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 6.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:W/RC:R
- Weakness (CWE)
- CWE-74, CWE-707
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulDB
- NVD analysis
- Deferred
- Record last updated
- Apr 20, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
langflow-ai langflow langflow:langflow | 1.8.0; 1.8.1; 1.8.2; 1.8.3 | CNA record |
References
- https://vuldb.com/vuln/358234vdb-entry, technical-description
- https://vuldb.com/vuln/358234/ctisignature, permissions-required
- https://vuldb.com/submit/791922third-party-advisory
- https://gist.github.com/chenhouser2025/a909c47316b7a0948ee68c109ab747a3exploit
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.