What’s Vulnerable › Vulnerabilities
CVE-2026-19875: Unauthenticated Registration POST Endpoint Permits Admin Email Overwrite and Outbound Relay Abuse in Langflow
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-19 · updated 2026-08-26
- Weakness: CWE-306
Description
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.
Affected products
- IBM Langflow OSS: from 1.0.0 before 1.10.1 — fixed in 1.10.1
How to fix
Upgrade to a fixed version: IBM Langflow OSS 1.10.1. Check the vendor advisory for mitigations.
References
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