CVE-2026-50242 Overview
CVE-2026-50242 is an authentication bypass vulnerability in JetBrains Hub. The flaw allows attackers with direct database access to obtain administrative access without valid credentials. JetBrains addressed the issue in Hub versions 2026.1.13757, 2025.3.148033, 2025.2.148048, 2025.1.148120, 2024.3.148430, and 2024.2.148429.
The vulnerability is categorized under [CWE-306]: Missing Authentication for Critical Function. Successful exploitation grants full administrative control over the Hub instance, compromising user accounts, permissions, and connected JetBrains services.
Critical Impact
An attacker reaching the Hub database can bypass authentication and gain administrative privileges, enabling full takeover of identity and access management for connected JetBrains products.
Affected Products
- JetBrains Hub versions before 2026.1.13757
- JetBrains Hub 2025.x branches before 2025.3.148033, 2025.2.148048, 2025.1.148120
- JetBrains Hub 2024.x branches before 2024.3.148430, 2024.2.148429
Discovery Timeline
- 2026-06-19 - CVE-2026-50242 published to NVD
- 2026-06-24 - Last updated in NVD database
Technical Details for CVE-2026-50242
Vulnerability Analysis
JetBrains Hub provides centralized authentication, user management, and licensing for JetBrains team tools such as YouTrack and TeamCity integrations. The vulnerability allows an actor with direct access to the Hub backend database to bypass authentication controls and assume administrative identity within the application.
The issue is network-exploitable when the database is reachable from an attacker-controlled position, and requires no user interaction or prior authentication to the Hub application itself. Because Hub centralizes identity for multiple JetBrains products, administrative compromise extends laterally to every downstream service relying on Hub for single sign-on.
Root Cause
The root cause is missing authentication for a critical function [CWE-306]. Administrative trust is established based on records or state read directly from the database rather than through the standard authenticated login flow. An attacker who can write or manipulate the underlying data can therefore present themselves as an administrator to the application layer.
Attack Vector
Exploitation requires reachability to the Hub database. This includes scenarios such as exposed database ports, compromised backup files, misconfigured cloud storage holding database dumps, or co-located services with database credentials. Once the attacker manipulates the relevant records, they authenticate to the Hub as an administrator and pivot to connected systems.
No public proof-of-concept code is available. JetBrains has not disclosed exploitation in the wild, and the CVE is not listed in the CISA Known Exploited Vulnerabilities catalog. Refer to the JetBrains Security Issues Fixed page for vendor details.
Detection Methods for CVE-2026-50242
Indicators of Compromise
- Unexpected administrator accounts or role changes in Hub audit logs without a corresponding login event.
- Database connections to the Hub backend from hosts outside the documented application tier.
- Unauthorized modifications to user, group, or permission tables in the Hub database.
- Administrative API calls from sessions that lack a preceding successful authentication record.
Detection Strategies
- Correlate Hub application authentication logs with administrative actions to identify privileged operations performed without a matching login.
- Monitor database query logs for direct writes to authentication and role tables outside scheduled maintenance windows.
- Alert on new sessions assigned administrative scopes that originate from atypical IP ranges or service accounts.
Monitoring Recommendations
- Enable verbose audit logging in JetBrains Hub and forward events to a centralized log platform.
- Track database access at the network layer, restricting inbound connections to known application hosts only.
- Review administrative role assignments and API token creations on a recurring schedule.
How to Mitigate CVE-2026-50242
Immediate Actions Required
- Upgrade JetBrains Hub to a fixed version: 2026.1.13757, 2025.3.148033, 2025.2.148048, 2025.1.148120, 2024.3.148430, or 2024.2.148429.
- Restrict network access to the Hub database so only the Hub application server can connect.
- Rotate Hub administrative credentials, API tokens, and service account secrets after patching.
- Review audit logs for unauthorized administrative actions prior to the upgrade.
Patch Information
JetBrains released fixes across all supported Hub branches. Apply the patch matching your deployment branch and validate the upgrade by confirming the build number in the Hub administrative console. Vendor details are available on the JetBrains Security Issues Fixed page.
Workarounds
- Place the Hub database behind a private network segment with no direct internet exposure.
- Enforce database authentication using strong, unique credentials and require TLS for all connections.
- Encrypt Hub database backups and restrict access to backup storage to a minimal set of administrators.
- Disable unused administrative endpoints and integrations until the patch is deployed.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
