---
id: CVE-2025-49652
title: >-
  Missing Authentication in the registration feature of Lablup's BackendAI
  allows arbitrary users to create user accounts that can access private data
  even when registration is disabled.
summary: >-
  Missing Authentication in the registration feature of Lablup's BackendAI
  allows arbitrary users to create user accounts that can access private data
  even when registration is disabled.
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-306
published: '2025-06-09'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T17:17:41.777'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-49652'
references:
  - url: 'https://hiddenlayer.com/sai_security_advisor/2025-06-backendai/'
    label: 6f8de1f0-f67e-45a6-b68f-98777fdb759c
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2025-49652'
  - url: 'https://hiddenlayer.com/sai_security_advisor/2025-05-backendai-49653'
  - url: 'https://hiddenlayer.com/sai_security_advisor/2025-06-backendai'
  - url: >-
      https://github.com/lablup/backend.ai/commit/37fc8f70f9bad2dd01fe2e288f9006e96f9914ed
  - url: >-
      https://github.com/lablup/backend.ai/commit/b6d3ddd9e285a7ce59722a37585b9298681eb82f
  - url: >-
      https://github.com/lablup/backend.ai/commit/d7704f506e319acff205d91bfca6e2ca92939983
  - url: >-
      https://github.com/pypa/advisory-database/tree/main/vulns/backend-ai/PYSEC-2026-290.yaml
  - url: 'https://pypi.org/project/backend-ai'
  - url: 'https://github.com/advisories/GHSA-ww28-4m4v-cq4j'
  - url: 'https://github.com/lablup/backend.ai'
tags:
  - nvd
  - cve.org
  - exploit-available
  - ghsa
  - pip
  - osv
epss: 0.00427
epssPercentile: 0.36791
ingestedAt: '2026-10-14T17:44:53.602Z'
vendor: Lablup
product: BackendAI
affected:
  - BackendAI < 25.15.6
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2025-06-09T18:51:21.168801Z'
aliases:
  - GHSA-ww28-4m4v-cq4j
  - PYSEC-2026-290
ecosystem: pip
patched:
  - backend.ai 25.15.6
  - backend.ai 25.19.0rc1
---

## Overview

Missing Authentication in the registration feature of Lablup's BackendAI allows arbitrary users to create user accounts that can access private data even when registration is disabled.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2025-49652)

Affected packages:

- `backend.ai < 25.15.6`
- `backend.ai >= 25.16.0rc1, < 25.19.0rc1`

Patched in:

- `backend.ai 25.15.6`
- `backend.ai 25.19.0rc1`

Source: https://github.com/advisories/GHSA-ww28-4m4v-cq4j