What is CVE-2026-10561?

CVE-2026-10561 is a critical-severity vulnerability in IBM Langflow Oss, classified under Code Injection. CVSS score: 10.0/10. Published 2026-06-22.

How severe is CVE-2026-10561?

Critical severity. CVSS v3 base score is 10.0 out of 10.

RCE in IBM Langflow Oss

CVE-2026-10561

IBM Langflow OSS 1.0.0 through 1.9.3 has an vulnerability due to an improper isolation of Python execution combined with an authentication bypass that allows an unauthenticated attacker to execute arbitrary code on the host system, resulting in complete compromise

Vulnerability class: RCE (Remote Code Execution)

Published 2026-06-22 · last modified 2026-06-26.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (61.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 61st percentile — 61.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

IBM Langflow Oss — versions 1.0.0
Langflow

Weakness classification (CWE)

CWE-94 — Code Injection

References

www.ibm.com/support/pages/node/7277242 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-10561?: CVE-2026-10561 is a critical-severity vulnerability in IBM Langflow Oss, classified under Code Injection. CVSS score: 10.0/10. Published 2026-06-22.
How severe is CVE-2026-10561?: Critical severity. CVSS v3 base score is 10.0 out of 10.