CVE-2025-3248

Name: CVE-2025-3248
Creator: NVD / NIST
Published: 2025-04-07T15:15:44.897+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 99.96%

Last modified Jun 17, 2026

CVE-2025-3248 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 99.96% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

99.96%

100.0th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by May 26, 2025.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Langflow	Langflow	< 1.3.0

References

https://github.com/langflow-ai/langflow/pull/6911Patch
https://github.com/langflow-ai/langflow/releases/tag/1.3.0Release Notes
https://www.horizon3.ai/attack-research/disclosures/unsafe-at-any-speed-abusing-python-exec-for-unauth-rce-in-langflow-ai/Exploit, Third Party Advisory
https://www.vulncheck.com/advisories/langflow-unauthenticated-rceThird Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-3248US Government Resource

Timeline

Published: Apr 7, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-3248?

How severe is CVE-2025-3248?

CVE-2025-3248 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 99.96% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2025-3248?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-3248?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST