CVE-2025-49652

Improper access control allows arbitrary account creation

9.8 CriticalFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.45%Up 0.4 points since Jun 10, 2025

What each source reports

CVE List Score used 9.8

Improper access control allows arbitrary account creation

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.

Record: CVE-2025-49652
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-306
Updated: 2026-11-02

EUVDEUVD-2025-17554 9.8

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.

Record: EUVD-2025-17554
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-ww28-4m4v-cq4j 9.8

BackendAI Missing Authentication for Critical Function

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.

Record: GHSA-ww28-4m4v-cq4j
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-306
Updated: 2026-11-02

NVD 9.8

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.

Record: CVE-2025-49652
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-306
Updated: 2026-11-02

OSV 9.8

Improper access control allows arbitrary account creation

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.

Record: CVE-2025-49652
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-306
Updated: 2026-11-02

OSVGHSA-ww28-4m4v-cq4j 9.8

BackendAI Missing Authentication for Critical Function

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.

Record: GHSA-ww28-4m4v-cq4j
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-306
Updated: 2026-11-02

OSVPYSEC-2026-290 9.8

BackendAI Missing Authentication for Critical Function

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.

Record: PYSEC-2026-290
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

lablup backendai

Affected packages

Affected packages
Package	Affected	Fixed
`backend-ai` PyPI	before 25.15.6	25.15.6
`backend-ai` PyPI	25.16.0rc1 up to 25.19.0rc1	25.19.0rc1
`backend-ai` PyPI	before 25.15.6, plus listed versions 1.0.01.0.11.0.21.1.01.2.0 Show 12 moreShow less 1.3.01.4.018.12.019.3.019.3.0a119.9.020.3.020.3.120.9.020.9.0a1.dev021.3.022.3.0	25.15.6
`backend-ai` PyPI	before 25.15.6, 25.16.0rc1 up to 25.19.0rc1, plus listed versions 1.0.01.0.11.0.21.1.01.2.0 Show 12 moreShow less 1.3.01.4.018.12.019.3.019.3.0a119.9.020.3.020.3.120.9.020.9.0a1.dev021.3.022.3.0	25.15.625.19.0rc1

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-49652 is a critical vulnerability (CVSS 9.8) in Lablup Backendai, published June 9, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.45%, the 39th percentile. Fixed in backend-ai 25.15.6.

References

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