CVE-2026-7663

criticalCVSS 9.1covered by 1 sourcefirst seen 2026-06-30

IBM Langflow OSS 1.0.0 through 1.9.6 could allow unauthenticated attackers to access protected MCP project resources and execute MCP operations due to improper authorization enforcement in the Streamable MCP transport endpoint.

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Exploitation outlook

Low exploitation risk0.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 17% of all EPSS-scored CVEs.

Advisory coverage (1)

criticalCVE-2026-7663: IBM Langflow OSS 1.0.0 through 1.9.6 could allow unauthenticated attackers to access protected …nvd · 2026-06-30

External references

NVD record for CVE-2026-7663

CVE.org record

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