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PatchSiren cyber security CVE debrief

CVE-2026-78575 IBM CVE debrief

IBM Langflow OSS versions 1.0.0 through 1.11.5 are vulnerable to a remote authenticated attacker executing arbitrary commands due to improper validation of command-line arguments in the MCP stdio server configuration. This issue poses a significant risk to deployments with remote access. Defenders should assess exposure and prioritize remediation efforts. The vulnerability allows attackers to execute commands, potentially leading to unauthorized access and data breaches. Affected deployments should verify and remediate this vulnerability, especially in environments with remote authenticated access.

Vendor
IBM
Product
Langflow OSS
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-10
Original CVE updated
2026-09-11
Advisory published
2026-09-10
Advisory updated
2026-09-11

Who should care

Defenders responsible for IBM Langflow OSS deployments, especially those with remote authenticated access, should assess exposure and prioritize remediation.

Why it matters

This vulnerability in IBM Langflow OSS allows remote authenticated attackers to execute arbitrary commands, posing a significant risk to deployments with remote access. Defenders should prioritize verification, remediation, and compensating controls.

  • Potential for arbitrary command execution by remote authenticated attackers
  • Need for verification of affected versions and remediation steps
  • Importance of restricting remote authenticated access to MCP stdio server
  • Requirement for additional validation of command-line arguments

Technical summary

The vulnerability exists in IBM Langflow OSS versions 1.0.0 through 1.11.5. Improper validation of command-line arguments in the MCP stdio server configuration allows a remote authenticated attacker to execute arbitrary commands. This issue arises from inadequate input validation, enabling attackers to inject malicious commands. Defenders should prioritize verifying and remediating this vulnerability in IBM Langflow OSS deployments, especially in environments with remote authenticated access. Implementing additional validation for command-line arguments and access

Defensive priority

Defenders should prioritize verifying and remediating this vulnerability in IBM Langflow OSS deployments, especially in environments with remote authenticated access.

Recommended defensive actions

  • Verify IBM Langflow OSS version and configuration
  • Restrict remote authenticated access to MCP stdio server
  • Implement additional validation for command-line arguments

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but additional verification is needed to confirm affected versions and remediation steps.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-78575 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-78575

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-78575 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-78575

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.