CVE-2026-104970

8.1 HIGHpublic exploit available

Published 2026-10-05 · Updated 2026-10-06

AI risk analysis

Summary: The flaw allows two unauthenticated users to create separate admin accounts, granting both unrestricted instance administration, due to the lack of transactional and locking mechanisms.
Exploitability: Exploitation is moderately hard as it requires two concurrent unauthenticated requests, but preconditions are minimal.
Blast radius: If exploited, this could lead to unauthorized access and control over the entire project management instance, severely impacting data integrity and security.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to version 1.4.0 or later.

auth-bypasswebmisconfiguration

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

Plane is an open-source project management tool. From 0.13 until 1.4.0, InstanceAdminSignUpEndpoint in apps/api/plane/license/api/views/admin.py:89-117, 173-229 uses InstanceAdmin.objects.first() for the first-admin check and performs account creation without an atomic transaction, row lock, uniqueness guard, or advisory lock. Two concurrent unauthenticated requests with different email addresses can both observe that no instance administrator exists, create separate User and InstanceAdmin rows, and receive sessions with instance-admin authority. This allows an attacker to share unrestricted instance administration with the legitimate operator. This issue is fixed in 1.4.0.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-362

Public exploit & PoC references

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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