VDB-303709 · CVE-2025-3248 · EUVD-2025-10011

langflow-ai langflow up to 1.2.0 HTTP Request /api/v1/validate/code missing authentication

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.9	$0-$5k	0.00

Summaryinfo

A vulnerability was found in langflow-ai langflow up to 1.2.0. It has been rated as critical. Affected is an unknown function of the file /api/v1/validate/code of the component HTTP Request Handler. This manipulation causes missing authentication. The identification of this vulnerability is CVE-2025-3248. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in langflow-ai langflow up to 1.2.0 and classified as critical. Affected by this vulnerability is an unknown function of the file /api/v1/validate/code of the component HTTP Request Handler. The manipulation with an unknown input leads to a missing authentication vulnerability. The CWE definition for the vulnerability is CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Langflow versions prior to 1.3.0 are susceptible to code injection in the /api/v1/validate/code endpoint. A remote and unauthenticated attacker can send crafted HTTP requests to execute arbitrary code.

The weakness was shared by Horizon3.ai. The advisory is shared at github.com. This vulnerability is known as CVE-2025-3248 since 04/04/2025. 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.

It is possible to download the exploit at exploit-db.com. It is declared as attacked. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 05/05/2025 with a due date of 05/26/2025:

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Upgrading to version 1.3.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Exploit-DB (52262) and EUVD (EUVD-2025-10011). Additional details are provided at isc.sans.edu. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Artificial Intelligence Software

Vendor

langflow-ai

Name

langflow

Version

Website

Product: https://github.com/langflow-ai/langflow/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.0
VulDB Meta Temp Score: 8.9

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CNA Base Score: 9.8
CNA Vector (VulnCheck): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
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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: Missing authentication
CWE: CWE-306 / CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Attacked
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: langflow 1.3.0
Patch: github.com

Timelineinfo

04/04/2025 🔍
04/08/2025 +4 days 🔍
04/08/2025 +0 days 🔍
07/07/2026 +455 days 🔍

Sourcesinfo

Product: github.com

Advisory: github.com
Researcher: Horizon3.ai
Status: Confirmed

CVE: CVE-2025-3248 (🔍)
GCVE (CVE): GCVE-0-2025-3248
GCVE (VulDB): GCVE-100-303709
EUVD: 🔍
scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔍

Entryinfo

Created: 04/08/2025 05:50
Updated: 07/07/2026 17:28
Changes: 04/08/2025 05:50 (69), 04/13/2025 13:55 (5), 04/20/2025 12:59 (3), 05/05/2025 22:43 (9), 05/06/2025 10:39 (1), 10/22/2025 01:52 (11), 11/29/2025 08:50 (1), 07/07/2026 17:28 (1)
Complete: 🔍
Cache ID: 216::103

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