CVE-2025-3248: Langflow Missing Authentication Vulnerability

CISA Known Exploited Vulnerabilities

Name

Langflow Missing Authentication Vulnerability

Vendor

Langflow

Product

Langflow

Added to the catalog

2025-05-05

Due date for US federal agencies

2025-05-26

Weaknesses

CWE-306

Catalog version

2026.10.30

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.

Required action (CISA)

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

Ransomware use: CISA marks this vulnerability as known to be used in ransomware campaigns. CISA does not say which group used it.

Links in CISA's notes

• https://github.com/advisories/GHSA-c995-4fw3-j39m
• https://nvd.nist.gov/vuln/detail/CVE-2025-3248

Read on 2026-11-02T23:39:54.475Z under licence cisa-kev-cc0@b0067899 from https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

NVD analysis

Status

Analyzed

Published

2025-04-07T15:15:44.897

Last modified

2026-10-08T16:16:52.420

Weaknesses

CWE-306, CWE-94

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.

References

• https://github.com/langflow-ai/langflow/pull/6911 (Patch)
• https://github.com/langflow-ai/langflow/releases/tag/1.3.0 (Release 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-rce (Third Party Advisory)
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-3248 (US Government Resource)

This product uses the NVD API but is not endorsed or certified by the NVD.

Read on 2026-11-02T23:42:22.836Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2025-3248

CVE record

Title (CNA)

Langflow < 1.3.0 Unauthenticated RCE via /api/v1/validate/code

Assigner

VulnCheck

State

PUBLISHED

Published

2025-04-07T14:22:38.980Z

Updated

2026-10-08T15:21:16.208Z

Problem types

CWE-306 Missing Authentication for Critical Function

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.

References

• https://github.com/langflow-ai/langflow/pull/6911
• https://github.com/langflow-ai/langflow/releases/tag/1.3.0
• https://www.horizon3.ai/attack-research/disclosures/unsafe-at-any-speed-abusing-python-exec-for-unauth-rce-in-langflow-ai/
• https://www.vulncheck.com/advisories/langflow-unauthenticated-rce

Read on 2026-11-03T02:16:08.294Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2025/3xxx/CVE-2025-3248.json

GitHub Advisory Database

Also known as / affected packages

Defensive techniques (MITRE D3FEND)

D3FEND maps these defensive techniques to the weakness (CWE) that NVD lists for this CVE, through the digital artifacts the weakness affects. D3FEND does not say they stop this vulnerability.

MITRE D3FEND™ knowledge graph. © 2025 The MITRE Corporation.
"The MITRE Corporation (MITRE) hereby grants you a non-exclusive, royalty-free license to use D3FEND for research, development, and commercial purposes. Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." Terms: https://d3fend.mitre.org/tou/