Home

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.

PUBLISHED Reserved 2026-04-19 | Published 2026-04-20 | Updated 2026-04-20 | Assigner VulDB




MEDIUM: 5.3CVSS: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
MEDIUM: 6.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:W/RC:R
MEDIUM: 6.3CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:W/RC:R
6.5AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:W/RC:UR

Problem types

Injection

Improper Neutralization

Product status

1.8.0
affected

1.8.1
affected

1.8.2
affected

1.8.3
affected

Timeline

2026-04-19:Advisory disclosed
2026-04-19:VulDB entry created
2026-04-19:VulDB entry last update

Credits

Eric-f (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/358234 (VDB-358234 | langflow-ai langflow Model Context Protocol Configuration API mcp_projects.py install_mcp_config injection) vdb-entry technical-description

vuldb.com/vuln/358234/cti (VDB-358234 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/submit/791922 (Submit #791922 | Langflow <= 1.8.3 Authentication Bypass by Spoofing) third-party-advisory

gist.github.com/...user2025/a909c47316b7a0948ee68c109ab747a3 exploit

cve.org (CVE-2026-6599)

nvd.nist.gov (CVE-2026-6599)

Download JSON