---
id: CVE-2025-49651
aliases:
  - GHSA-h889-475r-wfmm
  - PYSEC-2026-1210
title: Backend.AI Missing Authorization vulnerability
summary: Backend.AI Missing Authorization vulnerability
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'
vendor: backend-ai
product: backend-ai
ecosystem: pip
affected:
  - backend-ai <= 25.3.3
published: '2025-06-09'
updated: '2026-07-07'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-h889-475r-wfmm'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2025-49651'
  - url: 'https://github.com/lablup/backend.ai/pull/7587'
  - url: 'https://github.com/lablup/backend.ai'
  - url: 'https://hiddenlayer.com/sai_security_advisor/2025-05-backendai-49653'
  - url: 'https://hiddenlayer.com/sai_security_advisor/2025-06-backendai'
tags:
  - osv
  - pip
epss: 0.00338
epssPercentile: 0.24446
ingestedAt: '2026-07-08T18:25:50.018Z'
---

## Overview

Missing Authorization in Lablup's BackendAI allows attackers to takeover all active sessions; Accessing, stealing, or altering any data accessible in the session. This vulnerability exists in all current versions of BackendAI.

NOTE: The maintainers of BackendAI do not consider this report to fit with their threat model and advise users to follow security advice from https://github.com/lablup/backend.ai/pull/7587 in their instances to protect themselves from the conditions that would lead to the situation described in the CVE record.

## Affected packages

- `backend-ai <= 25.3.3`

## Remediation

Refer to the advisory for the patched release.