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CVE-2025-3248

9.8, critical Known exploited Used in ransomware

Langflow Missing Authentication Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab) CISA KEV catalogue (opens in a new tab)
CVSS
9.8, critical critical CVSS v3.1
EPSS, next 30 days
100% higher than 99.9% of scored CVEs
Exploitation
Confirmed in the wild
Published
7 Apr 2025a year ago

Known exploited

CISA added this to the Known Exploited Vulnerabilities Catalog on 5 May 2025 and links it to ransomware activity. US federal agencies had to remediate by 26 May 2025, a deadline that has passed.

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

Description

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.

Details

Vendor
Langflow
Product
langflow
Weakness
CWE-306 (opens in a new tab)
Status
Analyzed
Updated
8 Oct 2026
Assigner
disclosure@vulncheck.com

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References 5

Exploit code 1

Patches and fixes 1

Advisories 1

Other references 2

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Langflow CVEs

Every Langflow CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-55255 Langflow Authorization Bypass Through User-Controlled Key Vulnerability KEV EPSS 0.9% 8.4, high
  • CVE-2026-33017 Langflow Code Injection Vulnerability KEV EPSS 25% 9.8, critical
  • CVE-2026-0770 Langflow Inclusion of Functionality from Untrusted Control Sphere Vulnerability KEV EPSS 63% 9.8, critical
  • CVE-2025-34291 Langflow Origin Validation Error Vulnerability KEV EPSS 93% 8.8, high

Beyond this page

Is CVE-2025-3248 in your network?

This page tells you how dangerous CVE-2025-3248 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

CVE-2025-3248 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2025-3248 comes with the devices to patch.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.