What is CVE-2026-19286?

CVE-2026-19286 is a critical-severity vulnerability in IBM Langflow Oss, classified under Code Injection. CVSS score: 9.8/10. Published 2026-08-28.

How severe is CVE-2026-19286?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2026-19286 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in IBM Langflow Oss

CVE-2026-19286

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to execute arbitrary code due to improper enforcement of security restrictions on the A2A public endpoint.

Vulnerability class: RCE (Remote Code Execution)

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Ibm Langflow Oss

Weakness classification (CWE)

CWE-94 — Code Injection

Public proof-of-concept exploits

rmhowe425/POC-CVE-2026-19286

References

psirt@us.ibm.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-19286?: CVE-2026-19286 is a critical-severity vulnerability in IBM Langflow Oss, classified under Code Injection. CVSS score: 9.8/10. Published 2026-08-28.
How severe is CVE-2026-19286?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2026-19286 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.