What is CVE-2026-19297?

CVE-2026-19297 is a critical-severity vulnerability in IBM Langflow Oss, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 9.1/10. Published 2026-08-13.

How severe is CVE-2026-19297?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in IBM Langflow Oss

CVE-2026-19297

IBM Langflow OSS 1.0.0 through 1.9.6 could allow a remote attacker to obtain unauthorized access to user accounts due to improper restriction of excessive authentication attempts.

Published 2026-08-13 · last modified 2026-08-26.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.006 (46.9th percentile), scored 2026-09-27.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.9% 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: 0.006 · change: +0.002

Affected products

IBM Langflow Oss — versions 1.0.0
Langflow

Weakness classification (CWE)

CWE-307 — Improper Restriction of Excessive Authentication Attempts

References

www.ibm.com/support/pages/node/7283558 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-19297?: CVE-2026-19297 is a critical-severity vulnerability in IBM Langflow Oss, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 9.1/10. Published 2026-08-13.
How severe is CVE-2026-19297?: Critical severity. CVSS v3 base score is 9.1 out of 10.