CVE-2026-56142 Overview
CVE-2026-56142 is a privilege escalation vulnerability in JetBrains Hub. The flaw allows authenticated attackers to attach authentication details to accounts they do not own. This enables them to gain elevated access within the affected Hub deployment.
The vulnerability affects JetBrains Hub releases prior to 2026.1.13757, 2025.3.148033, 2025.2.148048, 2025.1.148120, 2024.3.148430, and 2024.2.148429. The issue is classified under CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes.
Critical Impact
Authenticated attackers can escalate privileges across JetBrains Hub accounts, compromising confidentiality, integrity, and availability of identity and project resources managed by Hub.
Affected Products
- JetBrains Hub versions before 2026.1.13757
- JetBrains Hub versions before 2025.3.148033, 2025.2.148048, and 2025.1.148120
- JetBrains Hub versions before 2024.3.148430 and 2024.2.148429
Discovery Timeline
- 2026-06-19 - CVE-2026-56142 published to NVD
- 2026-06-24 - Last updated in NVD database
Technical Details for CVE-2026-56142
Vulnerability Analysis
JetBrains Hub centralizes user accounts, authentication modules, and permissions for JetBrains team tools. The vulnerability resides in the account management logic responsible for binding authentication details (such as external identity provider links or credential records) to user accounts.
An authenticated attacker can attach their own authentication details to another account. Once attached, the attacker authenticates as the target account and inherits its privileges. The scope is changed because compromise of one user account propagates to other components that trust Hub-issued identities.
The attack requires network access to the Hub interface and low-privilege credentials. No user interaction is needed. Successful exploitation breaches confidentiality, integrity, and availability of the identity store and downstream JetBrains services that rely on Hub for single sign-on.
Root Cause
The flaw maps to [CWE-915], where the application improperly controls which attributes a request can modify on a dynamically resolved object. The account-binding endpoint accepts authentication detail modifications without sufficiently verifying that the requester owns the target account or has authorization to alter its credential bindings.
Attack Vector
Exploitation occurs over the network against the JetBrains Hub web interface or API. The attacker authenticates with a low-privilege account, then issues a request that attaches authentication artifacts to a higher-privileged account. After binding, the attacker logs in through the newly attached authentication path.
No verified public proof-of-concept code is available at the time of writing. Refer to the JetBrains Security Issues Fixed page for vendor-published technical context.
Detection Methods for CVE-2026-56142
Indicators of Compromise
- Unexpected modifications to authentication module entries or external login bindings in Hub audit logs.
- New OAuth, SAML, or password credential associations applied to administrative or service accounts outside change windows.
- Successful logins to privileged Hub accounts originating from IP addresses or devices previously associated with low-privilege users.
Detection Strategies
- Review Hub audit logs for auth-module attach or update events targeting accounts other than the requester's own.
- Correlate account modification events with subsequent authentication events from the same source IP or session.
- Alert on privilege changes or group membership additions immediately following authentication detail updates.
Monitoring Recommendations
- Forward JetBrains Hub audit and access logs to a centralized SIEM for correlation and retention.
- Baseline normal administrative activity and alert on out-of-band credential binding operations.
- Monitor downstream JetBrains services (YouTrack, TeamCity, Space) for session activity tied to recently modified Hub accounts.
How to Mitigate CVE-2026-56142
Immediate Actions Required
- Upgrade JetBrains Hub to 2026.1.13757, 2025.3.148033, 2025.2.148048, 2025.1.148120, 2024.3.148430, or 2024.2.148429 or later, depending on your current branch.
- Audit all accounts for unexpected authentication module bindings and remove unauthorized entries.
- Force credential rotation and re-authentication for administrative accounts after patching.
Patch Information
JetBrains has released fixed builds across all supported branches. Patch details and the full list of fixed security issues are documented on the JetBrains Security Issues Fixed page. Apply the appropriate fixed version for your deployment branch.
Workarounds
- Restrict network access to the Hub administrative interface to trusted management networks until patching completes.
- Disable self-service authentication module attachment for non-administrative roles where configurable.
- Increase audit log review cadence and require multi-factor authentication on all privileged Hub accounts.
# Verify the installed JetBrains Hub version after upgrade
cat /opt/hub/bin/hub.version
# Expected output should match a fixed release, for example:
# 2026.1.13757
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
