CVE-2025-3248

KEV catalog · CISA Known Exploited Vulnerabilities

CVE-2025-3248

Langflow · Langflow · Added 2025-05-05 · Published 2025-04-07

3-Day Required PoC Available KEV Automatable Active Exploitation

Details

VulnerabilityLangflow Missing Authentication Vulnerability

VendorLangflow

ProductLangflow

Date added2025-05-05

Due date2025-05-26

CISA catalogView on CISA KEV catalog

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

Descriptions

KEV: Langflow contains a missing authentication vulnerability in the /api/v1/validate/code endpoint that allows a remote, unauthenticated attacker to execute arbitrary code via crafted HTTP requests.

Compliance SSVC + BOD 26-04

Automatableyes

Technical impacttotal

Exploitation statusactive

3-day qualifyingYes

Public timeline3 days + forensic

Non-public timeline3 days + forensic

Forensic (public)Required

Forensic (non-public)Required

Research metadata

Last researched2026-06-14 05:03 UTC

Wall time0.3s

Searches3

Component defaultunknown

Sources https://nvd.nist.gov/vuln/detail/CVE-2025-3248
https://horizon3.ai/attack-research/disclosures/unsafe-at-any-speed-abusing-python-exec-for-unauth-rce-in-langflow-ai/
https://github.com/langflow-ai/langflow/releases/tag/1.3.0
https://github.com/verylazytech/CVE-2025-3248
https://github.com/anthony0x1/langflow-exploit
https://github.com/zapstiko/CVE-2025-3248
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/langflow_unauth_rce_cve_2025_3248.rb
https://github.com/vulhub/vulhub/blob/master/langflow/CVE-2025-3248/README.md
https://www.zscaler.com/blogs/security-research/cve-2025-3248-rce-vulnerability-langflow
https://www.trendmicro.com/en/research/25/f/langflow-vulnerability-flodric-botnet.html

QC notes

warn component_extraction: Component 'Langflow /api/v1/validate/code endpoint' matches or contains product name 'Langflow' — no specific component identified

Hunting hypothesis agent

Monitor for unauthenticated HTTP POST requests to the /api/v1/validate/code endpoint containing arbitrary Python code execution payloads in exposed Langflow instances.

Research details

ComponentLangflow /api/v1/validate/code endpoint

PreconditionsTarget must have Langflow deployed with the /api/v1/validate/code endpoint exposed without authentication agent

DeliveryRemote HTTP POST to /api/v1/validate/code

Public PoCyes

PoC URLs https://github.com/verylazytech/CVE-2025-3248
https://github.com/anthony0x1/langflow-exploit
https://github.com/zapstiko/CVE-2025-3248 Third-party repos; verify before use.

Advisoryhttps://github.com/langflow-ai/langflow/releases/tag/1.3.0

Exploit notesCVSS v3.1 base score: 9.8 (CRITICAL) | CVSS vector: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | Attack complexity: LOW | Exploitation is trivial via Python decorator or default argument injection in crafted POST requests

SummaryLangflow versions prior to 1.3.0 are vulnerable to unauthenticated remote code execution via the /api/v1/validate/code endpoint, where Python exec() is called on user-supplied code without authentication. Multiple public PoCs exist and active exploitation has been observed in the wild, including delivery of the Flodrix botnet.

Tia coverage

First reported2026-07-05

First exploit report2026-07-05

Exploit report → KEV426 days after the listing

When Tia's reporting first covered this CVE and whether a report claimed exploitation before the KEV listing. Lead-time deltas are measured from the exploitation report only — plain coverage is not exploitation intel. See the story links under Mentioned in for coverage detail.

Mentioned in

cve-2025-3248-langflow-missing-authentication-actively-exploited jadepuffer-agentic-ransomware-first-documented-ai-agent-driven-e the-agentic-ai-threat-cluster-seven-incidents-three-actors-and-w

Record schema v1.0. Enrichment is research-grade, not a substitute for analyst review.