CVE-2026-55450
Langflow: Unauthenticated file upload leads to DoS (space exhaustion) and information leak
CRITICAL 9.3
En bref
- Source
- NVD
- EPSS
- EPSS 1.19 % · centile 68 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- GitHub_M
- Statut NVD
- Analyzed
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.
Faiblesses (CWE)
- CWE-200 — Exposition d'informations sensibles à un acteur non autorisé
- CWE-306 — Authentification absente sur une fonction critique
- CWE-400 — Consommation de ressources non maîtrisée (déni de service)
Références
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 3.1 | CRITICAL 9.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:H | GitHub_M |
| CVSS 3.1 | CRITICAL 9.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:H | NVD · security-advisories@github.com (Secondary) |
Avis
- GHSA-x223-p2gf-v735 — Langflow: Unauthenticated file upload leads to DoS (space exhaustion) and information leak
- PYSEC-2026-224 — 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
Références européennes
- ENISA EUVD · EUVD-2026-38511
- GCVE · GCVE-0-2026-55450
Configurations affectées (CPE NVD)
cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*< 1.9.1
Produits affectés
| Produit | Versions |
|---|---|
| langflow-ai · langflow | affected < 1.9.1 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |