# CVE-2025-49652: BackendAI Missing Authentication for Critical Function

Source: https://junglewise.ai/threats/cve-2025-49652-backendai-missing-authentication-for-critical-function  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-06-09  
License: CC BY 4.0 with a link back

CVE-2025-49652 · Severity: critical · CVSS 9.8 · Published 2025-06-09

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.

Technologies: [backend-ai (PyPI)](https://junglewise.ai/threats/technologies/backend-ai). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2025-49652 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-49652 being exploited in the wild.

**How severe is CVE-2025-49652?** Critical severity, with a CVSS score of 9.8, published 9 June 2025.

**Which products and versions are affected?** backend-ai (PyPI) < 25.15.6, ECOSYSTEM:introduced=0,fixed=25.15.6, ECOSYSTEM:introduced=0,fixed=25.15.6,introduced=25.16.0rc1,fixed=25.19.0rc1.

**Is there a fix for CVE-2025-49652?** Yes. backend-ai (PyPI): upgrade to 25.15.6, 25.19.0rc1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2025-49652?** Check whether you run backend-ai (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- backend-ai (PyPI): upgrade to 25.15.6, 25.19.0rc1 or later

  ```sh
  pip install "backend-ai>=25.19.0rc1"
  ```


## Affected products

- backend-ai (PyPI) < 25.15.6, ECOSYSTEM:introduced=0,fixed=25.15.6, ECOSYSTEM:introduced=0,fixed=25.15.6,introduced=25.16.0rc1,fixed=25.19.0rc1

## Identifiers

- CVE-2025-49652
- GHSA-ww28-4m4v-cq4j
- PYSEC-2026-290

## Related threats

- [PYSEC-2026-1210 - Backend.AI Missing Authorization vulnerability](https://junglewise.ai/threats/cve-2025-49651-backend-ai-missing-authorization-vulnerability)
- [PYSEC-2026-1211 - BackendAI vulnerable to Exposure of Sensitive Information to an Unauthorized Actor](https://junglewise.ai/threats/cve-2025-49653-backendai-vulnerable-to-exposure-of-sensitive-information-to-an)