CVE-2026-19875 PUBLISHED

Unauthenticated Registration POST Endpoint Permits Admin Email Overwrite and Outbound Relay Abuse in Langflow

Assigner: ibm
Reserved: 14.08.2026 Published: 19.08.2026 Updated: 19.08.2026

IBM Langflow OSS 1.0.0 through 1.10.0 could allow a remote attacker to overwrite administrator email information and abuse the server as an outbound relay due to missing authentication for the registration endpoint.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS Score: 7.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	IBM
Product	Langflow OSS
Versions	affected from 1.0.0 to 1.10.0 (incl.)

Solutions

IBM strongly recommends addressing the vulnerability now by upgrading Langflow OSS to version 1.10.1 https://pypi.org/project/langflow/

References

https://www.ibm.com/support/pages/node/7283810

Problem Types

CWE-306 Missing Authentication for Critical Function CWE