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Description

A security flaw has been discovered in langflow-ai langflow up to 1.1.0. This issue affects the function create_upload_file of the file src/backend/base/Langflow/api/v1/endpoints.py of the component API Endpoint. The manipulation results in unrestricted upload. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

PUBLISHED Reserved 2026-04-19 | Published 2026-04-20 | Updated 2026-04-20 | Assigner VulDB




MEDIUM: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
HIGH: 7.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
HIGH: 7.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
7.5AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR

Problem types

Unrestricted Upload

Improper Access Controls

Product status

1.0
affected

1.1.0
affected

Timeline

2026-04-19:Advisory disclosed
2026-04-19:VulDB entry created
2026-04-19:VulDB entry last update

Credits

Eric-d (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/358231 (VDB-358231 | langflow-ai langflow API Endpoint endpoints.py create_upload_file unrestricted upload) vdb-entry technical-description

vuldb.com/vuln/358231/cti (VDB-358231 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/submit/791919 (Submit #791919 | Langflow <= 1.1.0 Unrestricted Upload of File with Dangerous Type) third-party-advisory

gist.github.com/...user2025/c2aabfdee41009cfe45d28a9924742a0 exploit

cve.org (CVE-2026-6596)

nvd.nist.gov (CVE-2026-6596)

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