Resource exhaustion in Langflow - CVE-2026-7528
Published: May 21, 2026
Vulnerability identifier: #VU132030
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-7528
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Langflow
Affected software:
Langflow
Langflow
Detailed vulnerability description
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources. A remote user can upload unlimited files to the Langflow OSS server via the deprecated /api/v1/upload/{flow_id} endpoint without authentication or validation, leading to potential disk space exhaustion (DoS) and information disclosure through absolute file path leakage in API responses.
How to mitigate CVE-2026-7528
Install updates from vendor's website.