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PatchSiren cyber security CVE debrief

CVE-2026-81204 IBM CVE debrief

IBM Langflow OSS 1.0.0 through 1.11.5 is vulnerable to code injection during graph construction. This critical vulnerability, with a CVSS score of 9.8, could allow a remote attacker to execute arbitrary code. Defenders should assess exposure and prioritize remediation to prevent potential remote code execution. The CVE record and NVD entry provide limited information, indicating a need for verification and potential security measures to restrict graph construction inputs and prevent code injection.

Vendor
IBM
Product
Langflow OSS
CVSS
CRITICAL 9.8
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, security teams, and vulnerability management teams should assess exposure and prioritize remediation. This critical vulnerability requires immediate attention to prevent potential remote code execution. Operators and administrators of affected systems must verify and apply necessary security measures.

Why it matters

Defenders should prioritize verifying and remediating this critical vulnerability in IBM Langflow OSS deployments to prevent potential remote code execution.

  • Remote code execution is possible
  • Code injection during graph construction requires verification
  • CVSS score of 9.8 indicates critical severity
  • Remediation priority is high due to potential impact

Technical summary

IBM Langflow OSS 1.0.0 through 1.11.5 is vulnerable to code injection during graph construction. This could allow a remote attacker to execute arbitrary code. The vulnerability has a CVSS score of 9.8, indicating critical severity. Defenders should prioritize verifying and remediating this vulnerability in IBM Langflow OSS deployments to prevent potential remote code execution.

Defensive priority

Defenders should prioritize verifying and remediating this vulnerability in IBM Langflow OSS deployments.

Recommended defensive actions

  • Verify IBM Langflow OSS version and check for updates
  • Review and restrict graph construction inputs
  • Implement additional security measures to prevent code injection

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability, indicating it is a critical issue with a CVSS score of 9.8. Defenders should verify and remediate this vulnerability in IBM Langflow OSS deployments. Evidence is limited, so defenders must take a cautious approach and review official advisories for further details.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-81204 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-81204

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

  • CVE-2026-81204 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-81204

    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.