External risk intelligence

JetBrains Hub Account Takeover via Predictable Restore Codes

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-56141

JetBrains Hub is a centralized identity, access management, and user hub service commonly deployed as a web-accessible application for team collaboration. Because it serves as a gateway for user authentication and management, it is frequently configured as an internet-facing or externally reachable service to support distributed or remote development teams.

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A security vulnerability has been identified in JetBrains Hub, potentially allowing unauthorized access through predictable account recovery codes. This issue affects how user accounts are secured during the restoration process. The primary concern is confirming if this technology is in use and if it has been exposed.

Predictable codes could allow account takeovers.
Hub is a central user and access management system.
Confirm if Hub is deployed and its exposure.

Attack Path

How an attacker could exploit the issue

An attacker could exploit a vulnerability in JetBrains Hub by leveraging predictable restore codes to gain unauthorized access to user accounts. This could occur if an attacker has network access and can interact with the system to initiate a password recovery process. The vulnerability allows for a complete takeover of compromised accounts.

Network access required.
Predictable restore codes.
Account takeover risk.

Live Threat

Current exploitation, exposure, and threat context

JetBrains Hub versions prior to the specified fixes could allow an attacker to take over user accounts by exploiting predictable restore codes. This vulnerability affects systems that use JetBrains Hub for account management when the service is accessible over a network.

User account control.
Predictable restore codes allow takeover.
Unauthorized access to accounts.

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability impacts JetBrains Hub, a service central to identity and access management. The first practical step is to identify all instances of JetBrains Hub, confirm their reachability and criticality, and locate the accountable owner for each. Subsequent remediation planning should be risk-based, coordinating with vendor management if necessary.

Identify affected JetBrains Hub instances.
Confirm reachability and business criticality.
Plan risk-based remediation with owners.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is JetBrains Hub?

JetBrains Hub is a centralized platform designed to manage user identities, permissions, and access across various development tools. It acts as a primary authentication gateway, allowing teams to unify their login processes and administrative tasks within a single, cohesive service.

What does CWE-338 mean for CVE-2026-56141?

CWE-338 refers to the use of a cryptographically weak pseudo-random number generator. In the context of this CVE, it means the recovery codes generated by the software are not sufficiently random or unpredictable, allowing an attacker to guess them and bypass standard account security measures.

How do predictable restore codes lead to account takeover?

If an attacker can anticipate the recovery codes used to reset or restore access to a user account, they can submit these codes to the system as if they were the legitimate user. This does not require the attacker to have previous credentials or physical access, only the ability to initiate the recovery workflow via the network.

Is my JetBrains Hub instance at risk?

Halo Surface Signal indicates that because Hub serves as a central authentication gateway, it is often deployed as an internet-facing service to support remote teams. If your instance is reachable over the internet, it is more accessible to external threats. You should check if your deployment is exposed to external networks rather than restricted to internal-only access.

What should I do first to address this CVE?

Your first step is to create an inventory of all JetBrains Hub instances running in your environment. Once you have identified them, confirm the specific version of each instance to see if it is affected, then coordinate with the system owners to prioritize updates or protective measures based on how critical and accessible each instance is.

References

www.jetbrains.com/privacy-security/issues-fixed/

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.