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CVE-2025-3248 (GCVE-0-2025-3248)

Vulnerability from cvelistv5 – Published: 2025-04-07 14:22 – Updated: 2026-07-14 22:25
VLAI CISA Shadowserver Previdian
Title
Langflow < 1.3.0 Unauthenticated RCE via /api/v1/validate/code
Summary
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.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: active Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-08-15 19:50 UTC
CWE
  • CWE-306 - Missing Authentication for Critical Function
Assigner
References
Impacted products
Vendor Product Version CPE status
langflow-ai langflow Affected: 0 , < 1.3.0 (semver)
    cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Naveen Sunkavally of Horizon3.ai
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 42f739f2-b3d8-4d5f-aedf-6d19eac11841

Vulnerability ID: CVE-2025-3248

Status: Confirmed

Status Updated: 2025-05-05 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2025-05-05
Asserted: 2025-05-05
Scope
Notes: KEV entry: Langflow Missing Authentication Vulnerability | Affected: Langflow / Langflow | Description: 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: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. | Due date: 2025-05-26 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): This 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
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-306
Feed CISA Known Exploited Vulnerabilities Catalog
Product Langflow
Due Date 2025-05-26
Date Added 2025-05-05
Vendorproject Langflow
Vulnerabilityname Langflow Missing Authentication Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-02-02 12:26 UTC | Updated: 2026-02-06 07:17 UTC
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: bb50a7db-7650-4936-9da0-72a01382cb04

Vulnerability ID: CVE-2025-3248

Status: Confirmed

Status Updated: 2026-07-20 00:00 UTC

Exploited: Yes

Characteristics
Severity: 98.0
Timestamps
First Seen: 2025-05-06
Asserted: 2025-05-06
Last Seen: 2026-07-20
Scope
Asset Exposure: ['internet-facing']
Notes: Affected: Langflow / Langflow | Class: ai-system | Severity: Critical (CVSS 9.8) | IoT: no | In CISA KEV: yes | Honeypot connections on 2026-07-20: 2253
Evidence

Type: Honeypot

Signal: In The Wild Attempts

Confidence: 70%

Source: shadowserver

Details
1D 2
Iot no
Feed Shadowserver Foundation honeypot/exploited-vulnerabilities
Type http-scan
Class ai-system
7D Avg 1
Vendor Langflow
30D Avg 1
90D Avg 2
Product Langflow
Cisa Kev yes
Connections 2253
Observation Date 2026-07-20
Vulnerability Class CVSS
Vulnerability Score 9.8
Vulnerability Severity Critical
References
Created: 2026-06-30 09:23 UTC | Updated: 2026-07-22 01:00 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 8bad2e49-f669-49ae-b80b-dbbd391835af

Vulnerability ID: CVE-2025-3248

Status: Confirmed

Status Updated: 2025-05-05 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2025-05-05
Asserted: 2025-05-05
Scope
Notes: KEVIntel entry: Langflow < 1.3.0 Unauthenticated RCE via /api/v1/validate/code | Affected: langflow-ai / langflow | CVSS: 9.8 (CRITICAL) | EPSS: 0.99959 | Used in malware: unknown | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title Langflow < 1.3.0 Unauthenticated RCE via /api/v1/validate/code
Vendor langflow-ai
Product langflow
Added Date 2025-05-05T00:00:00.000Z
Cvss Score 9.8
Epss Score 0.99959
Cvss Severity CRITICAL
Epss Percentile 0.99975
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev False
References
Created: 2026-06-23 14:04 UTC | Updated: 2026-07-10 06:14 UTC
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.