high CVSS 8.8

CVE-2026-17626·Docker vulnerability

IBM Langflow OSS 1.0.0 through 1.10.3 Langflow could allow an authenticated attacker to read, modify, or expose sensitive host files via Docker-based MCP servers due to incomplete filtering of dangerous Docker volume-mount and device-mapping arguments.

Severity
high
Software
Docker
Fixed in
1.11.0
Published
2026-08-05

Affected versions

From: 1.0.0

Until: 1.11.0

Fixed in: 1.11.0

How to fix this CVE

Docker installations running Langflow OSS versions 1.0.0 through 1.10.3 are vulnerable to authenticated attackers bypassing volume-mount and device-mapping restrictions, potentially exposing host filesystem contents. Upgrade Docker to version 1.11.0 or later, which implements strict input validation for MCP server configuration. After patching, audit Docker daemon logs and Langflow configurations to ensure no malicious volume mounts were established during the vulnerability window.

sudo dnf update docker-ce -y && sudo systemctl restart docker

Defensia detects this vulnerability

How to check if you are affected

  1. Check installed Docker version: docker --version | grep -oP '\d+\.\d+\.\d+'
  2. Verify Langflow OSS version: docker ps --filter 'ancestor=langflow' --format '{{.Image}}' || check deployment manifests for version tags between 1.0.0-1.10.3
  3. Search Docker daemon logs for suspicious volume mounts: sudo journalctl -u docker -n 500 | grep -i 'volume\|device\|mount' and examine for paths outside expected application directories
  4. Validate the patch: docker --version and confirm version is 1.11.0 or higher; test MCP server volume restrictions via docker inspect on running Langflow containers

FAQ

What is CVE-2026-17626?

This vulnerability affects Langflow OSS running on Docker, where insufficient input validation allows authenticated users to specify arbitrary Docker volume mounts and device mappings in MCP (Model Context Protocol) server configurations, enabling unauthorized access to sensitive host files including credentials and application data.

Is CVE-2026-17626 being actively exploited?

No active exploitation has been reported. This vulnerability requires authenticated access to Langflow, which limits opportunistic exploitation, though organizations with exposed Langflow instances or compromised credentials remain at risk.

What versions of Docker are affected by CVE-2026-17626?

Langflow OSS versions 1.0.0 through 1.10.3 are affected when running in Docker environments. Version 1.11.0 and later include fixes for dangerous volume-mount and device-mapping argument filtering.

How do I check if my server is vulnerable to CVE-2026-17626?

Run 'docker ps' to identify Langflow containers, then inspect the image tag for version numbers in the 1.0.0-1.10.3 range. Cross-reference with 'docker inspect <container_id>' to examine mounted volumes for paths outside the Langflow application directory.

Does Defensia detect CVE-2026-17626?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If Docker or Langflow OSS is installed on a monitored server, CVE-2026-17626 will appear in your dashboard with remediation steps.

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References

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