PT-2026-33705 · Langflow · Langflow

Eric-F · Published 2026-04-20 · Updated 2026-04-20 · CVE-2026-6599

Positive Technologies (AI Summary)

CVSS v2.0

6.5

Medium

Base vector

AV:N/AC:L/Au:S/C:P/I:P/A:P

Name of the Vulnerable Software and Affected Versions langflow-ai langflow versions prior to 1.8.4

Description An issue exists in the Model Context Protocol Configuration API within the get client ip/install mcp config functions of the file src/backend/base/langflow/api/v1/mcp projects.py. A remote attacker can perform an injection by manipulating the X-Forwarded-For argument.

Recommendations Update to version 1.8.4 or later.

Exploit

Fix

Improper Neutralization

Special Elements Injection

Weakness Enumeration

CWE-707

CWE-74

Related Identifiers

CVE-2026-6599

GHSA-V66P-F7X3-4794

Affected Products

Langflow

References · 8

• 🔥 https://gist.github.com/chenhouser2025/a909c47316b7a0948ee68c109ab747a3 · Exploit
• https://osv.dev/vulnerability/GHSA-v66p-f7x3-4794 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-6599 · Security Note
• https://github.com/langflow-ai/langflow · Note
• https://twitter.com/VulmonFeeds/status/2046093092600631527 · Twitter Post
• https://vuldb.com/vuln/358234/cti · Note
• https://vuldb.com/submit/791922 · Note
• https://vuldb.com/vuln/358234 · Note