CVE-2026-6596 | langflow-ai langflow up to 1.1.0 API Endpoint endpoints.py create_upload_file unrestricted upload

VDB-358231 · SUBMIT #791919 · CVE-2026-6596 LANGFLOW-AI LANGFLOW UP TO 1.1.0 API ENDPOINT ENDPOINTS.PY CREATE_UPLOAD_FILE UNRESTRICTED UPLOAD HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.6 $0-$5k 1.68+ Summaryinfo A vulnerability classified as critical has been found in langflow-ai langflow up to 1.1.0. Impacted is the function create_upload_file of the file src/backend/base/Langflow/api/v1/endpoints.py of the component API Endpoint. This manipulation causes unrestricted upload. This vulnerability is handled as CVE-2026-6596. The attack can be initiated remotely. Additionally, an exploit exists. The vendor was contacted early about this disclosure but did not respond in any way. Detailsinfo A vulnerability has been found in langflow-ai langflow up to 1.1.0 and classified as critical. Affected by this vulnerability is the function create_upload_file of the file src/backend/base/Langflow/api/v1/endpoints.py of the component API Endpoint. The manipulation with an unknown input leads to a unrestricted upload vulnerability. The CWE definition for the vulnerability is CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. As an impact it is known to affect confidentiality, integrity, and availability. It is possible to read the advisory at gist.github.com. This vulnerability is known as CVE-2026-6596. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known. The attack technique deployed by this issue is T1608.002 according to MITRE ATT&CK. It is possible to download the exploit at gist.github.com. It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Type Artificial Intelligence Software Vendor langflow-ai Name langflow Version 1.0 1.1.0 CPE 2.3info 🔒 🔒 CPE 2.2info 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 7.3 VulDB Meta Temp Score: 6.6 VulDB Base Score: 7.3 VulDB Temp Score: 6.6 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Unrestricted upload CWE: CWE-434 / CWE-284 / CWE-266 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Access: Public Status: Proof-of-Concept Download: 🔒 Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 04/19/2026 Advisory disclosed 04/19/2026 +0 days VulDB entry created 04/19/2026 +0 days VulDB entry last update Sourcesinfo Advisory: gist.github.com Status: Not defined CVE: CVE-2026-6596 (🔒) GCVE (CVE): GCVE-0-2026-6596 GCVE (VulDB): GCVE-100-358231 scip Labs: https://www.scip.ch/en/?labs.20161013 Entryinfo Created: 04/19/2026 15:52 Changes: 04/19/2026 15:52 (58) Complete: 🔍 Submitter: Eric-d Cache ID: 99:DCD:101 Submitinfo Accepted Submit #791919: Langflow <= 1.1.0 Unrestricted Upload of File with Dangerous Type (by Eric-d) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸