High severity · published Apr 20, 2026
CVE-2026-6596
langflow-ai langflow API Endpoint endpoints.py create_upload_file unrestricted upload
7.3
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LA
langflow · langflow-ai
1.0; 1.1.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-6596
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-6596
gist.github.com
https://gist.github.com/chenhouser2025/c2aabfdee41009cfe45d28a9924742a0
vuldb.com
https://vuldb.com/submit/791919
vuldb.com
https://vuldb.com/vuln/358231
vuldb.com
https://vuldb.com/vuln/358231/cti
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