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PUBLISHED

2026-06-23 17:17

MODIFIED

2026-06-23 18:18

CVSS_SCORE V3

9.3

EPSS (Prob. Exploit)

1.19%

Top 32.0%

🎯 NUCLEI TEMPLATE

DATA SOURCES:

NVD 🔗 2026-06-23 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-11-01 GITHUB 🔗 2026-11-05 OSV 🔗 2026-11-02 NUCLEI 🔗 2026-11-01

> DESCRIPTION

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.1, unauthenticated users can upload any amount of data to the server without any limitations. No need for any prior knowledge, only network access to Langflow. This can lead to space exhaustion on the server. In addition, in the response, the absolute path of the uploaded file is reported to the attacker, which is an information leak that can assist in chaining other primitives. This vulnerability is fixed in 1.9.1.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR

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

EXPLOITABILITY

3.9

IMPACT

4.7

> MÉTRIQUES CVSS DÉTAILLÉES

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

Métrique	Valeur	Interprétation
AV (Vecteur d'Attaque) Attack Vector	Network (N)	Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque) Attack Complexity	Low (L)	Peu de conditions requises pour exploiter
PR (Privilèges Requis) Privileges Required	None (N)	Aucune authentification requise
UI (Interaction Utilisateur) User Interaction	None (N)	Aucune interaction utilisateur nécessaire
S (Périmètre) Scope	Changed (C)	Impact s'étend au-delà du composant compromis
C (Impact Confidentialité) Confidentiality Impact	Low (L)	Divulgation limitée d'informations
I (Impact Intégrité) Integrity Impact	None (N)	Aucune modification de données possible
A (Impact Disponibilité) Availability Impact	High (H)	Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité

Low

Divulgation limitée d'informations

Intégrité

None

Aucune modification de données possible

Disponibilité

High

Interruption totale du service possible

> WEAKNESSES

CWE-200 CWE-306 CWE-400

> CWE DETAILED DESCRIPTIONS

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor - The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. | CWE-306: Missing Authentication for Critical Functionality - The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. | CWE-400: Uncontrolled Resource Consumption - The product does not properly control the allocation and maintenance of a limited resource.

> GITHUB SECURITY ADVISORY

GHSA-x223-p2gf-v735 CRITICAL

Langflow: Unauthenticated file upload leads to DoS (space exhaustion) and information leak

AFFECTED PACKAGES:

PIP / langflow

< 1.9.1

Fixed in: 1.9.1

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Langflow: Unauthenticated file upload leads to DoS (space exhaustion) and information leak

AFFECTED PACKAGES:

Unknown / Unknown

168 versions affected

ALIASES:

GHSA-x223-p2gf-v735, PYSEC-2026-224

> NUCLEI TEMPLATES

Des templates Nuclei sont disponibles pour scanner cette vulnérabilité.

🎯

CVE-2026-55450.yaml

http/cves/2026/CVE-2026-55450.yaml

Usage: nuclei -t http/cves/2026/CVE-2026-55450.yaml -u target.com

> HISTORIQUE DES MODIFICATIONS

Première apparition

23/06/2026 17:17

Source: NVD

📊 ENRICHISSEMENT 01/11/2026 06:59

CWE

Champ modifié: Description CWE

Ancienne valeur:

Nouvelle valeur:

📊 ENRICHISSEMENT 01/07/2026 06:01

CWE