CVE-2026-61628

Published: Set 21, 2026 Last Modified: Set 23, 2026
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 8,1
Source: [email protected]
Attack Vector: network
Attack Complexity: high
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high

Description

AI Translation Available

nginx ignition is a user interface for the nginx web server. Prior to version 2.41.1, `POST /api/users/onboarding/finish` is registered as anonymous (unauthenticated) and creates a user with full ReadWrite admin permissions. Because the handler uses a check-then-act (TOCTOU) pattern between the 'onboarding already completed?' check and the user-creation write, with no atomic guard, a remote unauthenticated attacker who can reach an instance in its pre-onboarding state can create an administrator account for themselves — and concurrent requests can create multiple admin accounts in a single race. Version 2.41.1 patches the issue.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0043
Percentile
0,4th
Updated

Single Data Point

Only one EPSS measurement is available for this CVE. Trend analysis requires multiple data points over time.

362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Draft
Abstraction: Class Structure: Simple
Common Consequences
Security Scopes Affected:
Availability Confidentiality Integrity Access Control
Potential Impacts:
Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Dos: Resource Consumption (Other) Dos: Crash, Exit, Or Restart Dos: Instability Read Files Or Directories Read Application Data Execute Unauthorized Code Or Commands Gain Privileges Or Assume Identity Bypass Protection Mechanism
Applicable Platforms
Languages: C, C++, Java
Technologies: Mobile, ICS/OT
Likelihood of Exploit: Medium
View CWE Details
https://github.com/lucasdillmann/nginx-ignition/security/ad…
https://github.com/lucasdillmann/nginx-ignition/security/advisories/GHSA-pxcx-f…
https://github.com/lucasdillmann/nginx-ignition/commit/0586…
https://github.com/lucasdillmann/nginx-ignition/commit/0586b4e55ab780676d3553a2…
https://github.com/lucasdillmann/nginx-ignition/security/ad…
https://github.com/lucasdillmann/nginx-ignition/security/advisories/GHSA-pxcx-f…