What is CVE-2026-9077?

CVE-2026-9077 is a high-severity vulnerability in IBM Langflow Oss, classified under CWE-807. CVSS score: 8.5/10. Published 2026-08-05.

How severe is CVE-2026-9077?

High severity. CVSS v3 base score is 8.5 out of 10.

Vulnerability in IBM Langflow Oss

CVE-2026-9077

IBM Langflow OSS 1.0.0 through 1.10.3 Langflow allows remote authenticated attackers to bypass localhost-only restrictions and write arbitrary MCP server configurations to IDE configuration files on the host system.

Published 2026-08-05 · last modified 2026-08-06.

CVSS v3 metric

CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N.

EPSS exploit prediction

EPSS: 0.004 (38.0th percentile), scored 2026-11-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

IBM Langflow Oss — versions 1.0.0
Langflow

Weakness classification (CWE)

CWE-807

References

www.ibm.com/support/pages/node/7282147 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-9077?: CVE-2026-9077 is a high-severity vulnerability in IBM Langflow Oss, classified under CWE-807. CVSS score: 8.5/10. Published 2026-08-05.
How severe is CVE-2026-9077?: High severity. CVSS v3 base score is 8.5 out of 10.