JetBrains Patches Hub, YouTrack, IDE and TeamCity Flaws That Could Lead to Account Takeover and Code Execution

JetBrains has released security fixes for several vulnerabilities affecting Hub, YouTrack, Kotlin, GoLand, IntelliJ IDEA, and TeamCity. The most serious issues involve authentication bypass, account takeover, privilege escalation, and remote code execution paths across development and project management environments.

The fixed issues are listed on JetBrains’ security issues page, which tracks product, severity, CVE identifier, weakness type, and the version where each flaw was resolved.

The highest-risk flaws affect JetBrains Hub and YouTrack because those systems can sit close to identity, project tracking, permissions, and team workflows. Code execution bugs in IDEs and TeamCity add extra risk for organizations that use JetBrains tools across development and build pipelines.

Hub and YouTrack Issues Carry the Highest Enterprise Risk

One of the most serious Hub flaws is tracked as CVE-2026-50242. The vulnerability allows authentication bypass through direct database access, which can lead to administrative access in affected JetBrains Hub versions.

Hub also received fixes for account takeover through predictable restore codes and privilege escalation through attached authentication details. These flaws are tracked as CVE-2026-56141 and CVE-2026-56142.

YouTrack is also affected by an authentication bypass issue tied to the same direct database access pattern. Tenable’s plugin entry for CVE-2026-50242 in YouTrack says affected versions can allow administrative access and should be upgraded to the fixed builds.

Affected Products and Fixed Versions

Product	Main issue	CVE	Fixed version or release line
JetBrains Hub	Authentication bypass through direct database access	CVE-2026-50242	2026.1.13757, 2025.3.148033, 2025.2.148048, 2025.1.148120, 2024.3.148430, 2024.2.148429
JetBrains Hub	Account takeover through predictable restore codes	CVE-2026-56141	2026.1.13757, 2025.3.148033, 2025.2.148048, 2025.1.148120, 2024.3.148430, 2024.2.148429
JetBrains Hub	Privilege escalation by attaching authentication details to accounts	CVE-2026-56142	2026.1.13757, 2025.3.148033, 2025.2.148048, 2025.1.148120, 2024.3.148430, 2024.2.148429
YouTrack	Authentication bypass leading to administrative access	CVE-2026-50242	2026.1.13757, 2025.3.148033, 2025.2.148048, 2025.1.148120, 2024.3.148430, 2024.2.148429
Kotlin	Code execution through unsafe deserialization in build cache metadata	CVE-2026-53914	Kotlin 2.4.20
GoLand	Remote code execution through untrusted project configuration	CVE-2026-53915	GoLand 2026.1.3
IntelliJ IDEA	Command injection through filename completion	CVE-2026-49366	IntelliJ IDEA 2026.1.1
IntelliJ IDEA	Command execution through the guest user account	CVE-2026-49367	IntelliJ IDEA 2026.1.1
TeamCity	Remote code execution through Perforce connection settings	CVE-2026-49373	TeamCity 2026.1

The fixed versions matter because the vulnerabilities span several release lines. Organizations running older but still recent 2024, 2025, or 2026 branches should not assume they are protected without checking the exact build number.

Development platforms often hold source code, user identities, API tokens, build secrets, deployment credentials, and project history. That makes JetBrains server products and developer tools valuable targets even when a bug requires some precondition, such as access to a guest session or a malicious project.

Why the Hub Bugs Need Fast Attention

Hub acts as an identity and access layer for JetBrains services. A compromise of Hub can affect users, groups, permissions, authentication links, and connected project systems.

The predictable restore-code flaw in CVE-2026-56141 can lead to account takeover. That risk is serious because recovery features sit directly inside the account trust model.

The authentication-detail issue in CVE-2026-56142 can allow privilege escalation. In a shared development environment, that could let a lower-privileged account gain access to data, workflows, or administrative actions it should not control.

YouTrack Exposure Can Affect Project Data

YouTrack is commonly used for issue tracking, planning, project administration, and team coordination. A privilege or authentication problem in YouTrack can expose more than simple tickets.

Project management systems can contain vulnerability notes, customer escalations, unreleased product plans, internal roadmaps, and security work items. Attackers who gain administrative access can review, alter, or delete sensitive operational data.

Administrators should update YouTrack to one of the fixed versions listed in the Tenable YouTrack advisory entry and audit administrative actions after the upgrade.

IDE and Build Tool Flaws Create Supply Chain Risk

The Kotlin vulnerability, CVE-2026-53914, involves unsafe deserialization in build cache metadata before Kotlin 2.4.20. Build metadata is sensitive because developers and CI systems may process it automatically.

GoLand before 2026.1.3 is affected by CVE-2026-53915, a remote code execution issue through untrusted project configuration. This makes opening projects from unknown sources a higher-risk action on unpatched systems.

IntelliJ IDEA also received fixes for command execution paths. CVE-2026-49366 involves command injection through filename completion, while CVE-2026-49367 involves command execution through the guest user account.

TeamCity Needs Separate CI/CD Review

TeamCity is especially sensitive because CI/CD platforms connect source code, build agents, package repositories, signing keys, and deployment pipelines. A successful attack against a build server can affect far more than one developer workstation.

The TeamCity issue tracked as CVE-2026-49373 allows remote code execution through Perforce connection settings in versions before 2026.1. The NVD entry lists the issue as network reachable and requiring low privileges.

Teams using Perforce integrations should patch TeamCity, review connection settings, check build configuration history, and rotate secrets that may have been available to vulnerable build projects.

What Administrators Should Do Now

• Inventory all JetBrains Hub, YouTrack, TeamCity, IntelliJ IDEA, GoLand, and Kotlin installations.
• Upgrade Hub and YouTrack first because the highest-impact flaws affect authentication and administrative access.
• Update TeamCity and review Perforce connection settings, build logs, and project configuration changes.
• Update IntelliJ IDEA and GoLand on developer endpoints, especially on machines that open external projects.
• Upgrade Kotlin to 2.4.20 or later where vulnerable build cache workflows may run.
• Restrict direct database access for Hub and YouTrack to trusted administrators and service accounts only.
• Rotate tokens, API keys, and build credentials if suspicious access appears in logs.

JetBrains’ fixed security issues page should be treated as the primary patch reference because it maps each vulnerability to a resolved product version.

Organizations with shared developer environments should also review guest access, remote development sessions, plugin policies, and untrusted project handling. IDE vulnerabilities often need user interaction, but attackers can still exploit that through malicious repositories, shared projects, or social engineering.

Security Teams Should Look Beyond Patching

Patching closes the known weaknesses, but it does not answer whether attackers already abused a vulnerable instance. Hub, YouTrack, and TeamCity administrators should review logs for unusual authentication changes, new administrators, modified project permissions, and unexpected database access.

For developer endpoints, teams should check whether users opened suspicious projects, accepted unknown collaboration sessions, or ran builds with untrusted cache data. These actions can help identify whether the IDE and Kotlin issues created real exposure.

The main lesson is that development tools are part of the security perimeter. When identity systems, project trackers, IDEs, build tools, and CI servers share credentials or workflows, one unpatched product can become a path into the rest of the software delivery chain.

Recommended Priority Order

Priority	Action	Reason
Critical	Patch Hub and YouTrack	Authentication and administrative access issues can affect many connected users and projects
High	Patch TeamCity	Build servers hold secrets, artifacts, source access, and deployment paths
High	Update IntelliJ IDEA and GoLand	Developer endpoints can execute attacker-controlled commands through project or session abuse
Medium	Update Kotlin build tooling	Unsafe deserialization in build cache metadata can affect automated build flows
Ongoing	Audit credentials and logs	Tokens, API keys, and project permissions may remain exposed after patching

Organizations should avoid treating these fixes as routine desktop updates. JetBrains tools often sit inside engineering workflows that control source code, deployment logic, and production access.

That makes a coordinated patch plan important. Security teams should work with developers, build engineers, and platform owners so updates do not break workflows, but still move quickly enough to reduce exposure.

The safest response is to patch, restrict administrative paths, limit untrusted project execution, and rotate sensitive credentials where logs show suspicious activity.

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