Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2025-3248

langflow Remote Code Execution

Langflow-ai / langflow · affected before 1.3.0

Watch CVE-2025-3248 Browse KEV feed
Severity
CVSS 9.8 · Critical
Confidence
Confirmed
Exploit status
Exploited in the wild
EPSS
100.0%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2025-3248 is an unauthenticated vulnerability affecting Langflow-ai langflow. Langflow versions prior to 1.3.0 are susceptible to code injection in the /api/v1/validate/code endpoint. A remote and unauthenticated...

Is it exploited?

Yes. Previdian tracks this CVE as a known exploited vulnerability. Confidence is confirmed. Listed in CISA KEV. Also confirmed by third-party sources.

Who is affected?

Langflow-ai / langflow affected before 1.3.0.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

Langflow versions prior to 1.3.0 are susceptible to code injection in the /api/v1/validate/code endpoint

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.

langflow-ai Affected
langflow
Before 1.3.0
View vendor advisory (opens in new tab)
Published
07 Apr 2025
Exploitation Reported
05 May 2025
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
None

Tags

nuclei_scanner metasploit cisa

CVE References

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CISA

Recorded 05 May 2025

A trusted third party reported exploitation.

Proof of concept available

CVE

Recorded 28 Apr 2025

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access
Source Added
CISA First 2025-05-05 00:00 UTC
The Shadowserver 2026-06-01 00:00 UTC
Daily CyberSecurity 2026-06-05 09:20 UTC
CVE 2026-06-23 16:40 UTC
Google Threat Intelligence 2026-09-30 15:21 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
0
0
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Metasploit https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/langflow_unauth_rce_cve_2025_3248.rb 28 Apr 2025
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-3248.yaml 25 Apr 2025

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

9.8 Critical

Potential damage if exploited. Separate from whether attackers are using it.

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

EPSS

100.0%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Missing Authentication for Critical Function CWE-306

Recent mention · Google Threat Intelligence

Written by: Robin Grunewald, Supriya Mazumdar, Kelli Vanderlee Introduction Google Threat Intelligence Group (GTIG) examines vulnerability...

Written by: Robin Grunewald, Supriya Mazumdar, Kelli Vanderlee Introduction Google Threat Intelligence Group (GTIG) examines vulnerability disclosure and exploitation statistics to evaluate the impact of artificial intelligence (AI) on the vulnerability threat landscape. We...

Read full advisory

All Mentions

Recent mention · Google Threat Intelligence

Written by: Robin Grunewald, Supriya Mazumdar, Kelli Vanderlee Introduction Google Threat Intelligence Group (GTIG) examines vulnerability...

Google Threat Intelligence · 30 Sep 2026

Written by: Robin Grunewald, Supriya Mazumdar, Kelli Vanderlee Introduction Google Threat Intelligence Group (GTIG) examines vulnerability disclosure and exploitation statistics to evaluate the impact of artificial intelligence (AI) on the vulnerability threat landscape. We found that AI is measurably changing not just the pace of vulnerability discovery and exploitation, but also the types and typical risk profiles of vulnerabilities that are being discovered. Key findings:  Vulnerability disclosures doubled: the number of vulnerabilities disclosed per month doubled, rising from 5,045...

Recent mention · The Hacker News

JADEPUFFER-Linked Attackers Used Compromised Service Principals to Delete Azure Resources

The Hacker News · 28 Sep 2026

Ravie LakshmananSep 28, 2026Cloud Security / Identity Security The threat actor known as JADEPUFFER has been observed orchestrating destructive actions within a Microsoft Azure environment using compromised service principals. Microsoft, which is tracking the activity under the name Storm-3168, has called it an evolution of the threat actor's tradecraft. The attack took place in early June 2026 over a period of about 18 hours. "The destructive operations were facilitated by compromising service principals and targeted Azure Storage Accounts, SQL databases, Key Vaults, Function Apps,...

Recent mention · SOCRadar

Agentic Ransomware: From Human-Operated to AI-Operated Attacks

SOCRadar · 15 Sep 2026

Agentic Ransomware: From Human-Operated to AI-Operated Attacks Ransomware has always needed a human involved somewhere: an affiliate navigating a network by hand, or at minimum, a person who wrote the script the malware

Recent mention · Tenable Blog

The Agentic AI threat cluster: Seven incidents, three actors, and what they mean for your exposure

Tenable Blog · 15 Aug 2026

Tenable’s Research Special Operations (RSO) team has been tracking a cluster of agentic AI threat activity since late July 2026. The Taiwan autonomous AI cyber attack confirmed what the cluster data already showed: near-autonomous offensive AI has crossed from theoretical risk to operational reality.Key TakeawaysTaiwan's Ministry of Digital Affairs confirmed a near-autonomous AI cyber attack in July 2026 in which autonomous agents mapped 21 connected government systems, compromised 85 accounts, and exfiltrated more than 2,564 personnel records in approximately four days.The Taiwan campaign...

Recent mention · Daily CyberSecurity

Teamwork Cloud RCE Vulnerability Threatens Corporate Modeling Platforms

Daily CyberSecurity · 05 Jun 2026

A critical Teamwork Cloud RCE vulnerability exposes corporate modeling architectures to full remote takeover. The software bug carries The post Teamwork Cloud RCE Vulnerability Threatens Corporate Modeling Platforms appeared first on Daily CyberSecurity. Related posts: CVE-2025-5086 (CVSS 9.0): A Critical RCE in DELMIA Apriso with Exploit Attempts Seen in the Wild Langflow Under Attacks: CVE-2025-3248 Exploited to Deliver Stealthy Flodrix Botnet RenderShock: New Zero-Click Attack Explores Hidden Vulnerabilities in OS & Enterprise Environments

Recent mention · The Hacker News

Critical Langflow Flaw Added to CISA KEV List Amid Ongoing Exploitation Evidence

The Hacker News · 06 May 2025

A recently disclosed critical security flaw impacting the open-source Langflow platform has been added to the Known Exploited Vulnerabilities (KEV) catalog by the U.S. Cybersecurity and Infrastructure Security Agency (CISA), citing evidence of active exploitation. The vulnerability, tracked as CVE-2025-3248, carries a CVSS score of 9.8 out of a maximum of 10.0. "Langflow contains a missing

Recent mention · All CISA Advisories

CISA Adds One Known Exploited Vulnerability to Catalog

All CISA Advisories · 05 May 2025

CISA has added one new vulnerability to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. CVE-2025-3248 Langflow Missing Authentication Vulnerability These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise. Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the Known Exploited Vulnerabilities Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the...

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

CVE Record exploit — horizon3.ai

cve · Created Unknown

Langflow AI - Unauthenticated Remote Code Execution

nuclei · Created Unknown

langflow_unauth_rce_cve_2025_3248

metasploit · Created Unknown

Metasploit module for CVE-2025-3248

Timeline

From disclosure to observed exploitation

  1. 15:21 UTC

    KEV confirmed by Google Threat Intelligence

    Exploitation attested by an external source

  2. 16:40 UTC

    KEV confirmed by CVE

    Exploitation attested by an external source

  3. 09:20 UTC

    KEV confirmed by Daily CyberSecurity

    Exploitation attested by an external source

  4. 00:00 UTC

    KEV confirmed by The Shadowserver

    Exploitation attested by an external source

  5. 00:00 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  6. 15:02 UTC

    Metasploit module available

    Exploit module available

  7. 15:02 UTC

    Public PoC available

    Public proof-of-concept code published

  8. 00:00 UTC

    Nuclei template available

    Scanner coverage available

  9. 14:22 UTC

    CVE published

    Vulnerability disclosed publicly

  10. 00:58 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2025-3248

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2025-3248",
  "confidence": "Confirmed",
  "cvss_score": 9.8,
  "cvss_estimated": false,
  "epss_score": 0.99993,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}