# CVE-2025-3248: Langflow - RCE

> Live exploitation tracking for CVE-2025-3248 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2025-3248

## Key facts

- **Exploitation phase:** Background Noise. Continuous low-level scanning or exploitation attempts are observed, mostly opportunistic and automated.
- **CVSS score:** 9.8
- **Public exploit available:** Yes
- **Affected products:** Langflow
- **Weaknesses:** CWE-306 (Missing Authentication for Critical Function)
- **Tags:** ai_mcp

## 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.

## CrowdSec analysis

[CVE-2025-3248](https://euvd.enisa.europa.eu/vulnerability/CVE-2025-3248) is a critical vulnerability in Langflow that allows unauthenticated remote code execution through a code injection flaw in a validation endpoint.

CrowdSec has been tracking this vulnerability and its exploits since 31st of March 2025.

Based on data from the CrowdSec network, nearly all observed exploitation of CVE-2025-3248 is fully opportunistic, with attackers indiscriminately scanning the entire internet. These attacks are automated and lack any form of target selection or reconnaissance.
CrowdSec data also reveals a clear uptick in attacks involving CVE-2025-3248 over the past week. Activity is above the usual baseline, suggesting growing attention from attackers. This may reflect rising awareness, recent exploit releases, or expanded targeting efforts.

Observed exploitation attempts are aimed at URLs containing `/api/v1/validate/code`.

## Timeline

- 2025-03-31: Rule Released. CrowdSec releases a rule to detect CVE-2025-3248 exploitation attempts against the CrowdSec Network.
- 2025-04-07: CVE Published. CVE-2025-3248 is published to NVD.
- 2025-05-05: CISA KEV. CVE-2025-3248 is added to the Known Exploited Vulnerabilities catalog by CISA.
- 2025-05-07: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2025-3248 for the first time.
- 2025-05-26: CISA Remediation Deadline. Expiration of the CISA remediation deadline as described in [BOD 22-01](https://www.cisa.gov/news-events/directives/bod-22-01-reducing-significant-risk-known-exploited-vulnerabilities).

## References

- https://github.com/langflow-ai/langflow/pull/6911
- https://github.com/langflow-ai/langflow/releases/tag/1.3.0
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-3248.yaml

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2025-3248) follows observed exploitation activity for CVE-2025-3248. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.