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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-3248
StatePUBLISHED
AssignerVulnCheck
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-04-07 15:15:44 UTC
Updated2026-07-14 23:17:27 UTC
DescriptionLangflow 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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

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

EPSS: 0.999900000 probability, percentile 0.999850000 (date 2026-07-22)

CISA KEV: Listed on 2025-05-05; due 2025-05-26; ransomware use Known

Problem Types: CWE-306 | CWE-94 | CWE-306 CWE-306 Missing Authentication for Critical Function

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1[email protected]Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

CISA Known Exploited Vulnerability

VendorLangflow
ProductLangflow
NameLangflow Missing Authentication Vulnerability
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.
NotesThis vulnerability affects a common open-source project, third-party library, or a protocol used by different products. For more information, please see: https://github.com/advisories/GHSA-c995-4fw3-j39m ; https://nvd.nist.gov/vuln/detail/CVE-2025-3248

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Langflow Langflow All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Langflow-ai Langflow affected 1.3.0 semver Not specified

References

ReferenceSourceLinkTags
www.vulncheck.com/advisories/langflow-unauthenticated-rce [email protected] www.vulncheck.com Third Party Advisory
www.cisa.gov/known-exploited-vulnerabilities-catalog 134c704f-9b21-4f2e-91b3-4a467353bcc0 www.cisa.gov US Government Resource
www.horizon3.ai/attack-research/disclosures/unsafe-at-any-speed-abusing-pytho... [email protected] www.horizon3.ai Exploit, Third Party Advisory
github.com/langflow-ai/langflow/releases/tag/1.3.0 [email protected] github.com Release Notes
github.com/langflow-ai/langflow/pull/6911 [email protected] github.com Patch
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
CISA Known Exploited Vulnerabilities catalog CISA www.cisa.gov kev

Vendor Comments And Credit

Discovery Credit

CNA: Naveen Sunkavally of Horizon3.ai (en)

Additional Advisory Data

SourceTimeEvent
ADP2025-05-05T00:00:00.000ZCVE-2025-3248 added to CISA KEV

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