PatchSiren cyber security CVE debrief

CVE-2026-56142 JetBrains CVE debrief

CVE-2026-56142 is a critical privilege escalation vulnerability in JetBrains Hub. The issue allows attackers to escalate privileges by attaching authentication details to accounts. This vulnerability affects multiple versions of JetBrains Hub, including those prior to 2026.1.13757, 2025.3.148033, 2025.2.148048, 2025.1.148120, 2024.3.148430, and 2024.2.148429. The vulnerability has a CVSS score of 9.9, indicating a high severity level. Organizations using affected versions of JetBrains Hub should prioritize patching to mitigate the risk of exploitation.

Vendor: JetBrains
Product: Hub
CVSS: CRITICAL 9.9
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-19
Original CVE updated: 2026-06-22
Advisory published: 2026-06-19
Advisory updated: 2026-06-22

Who should care

IT administrators and security teams responsible for managing and securing JetBrains Hub installations should be aware of this vulnerability. Given the high CVSS score of 9.9, this issue should be treated as a priority for patching. Developers and users of JetBrains Hub, especially those in environments where privilege escalation could have significant impacts, need to assess their exposure and take appropriate action.

Technical summary

The vulnerability, CVE-2026-56142, is a privilege escalation issue in JetBrains Hub. It arises from the improper handling of authentication details, allowing an attacker to escalate privileges. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H, indicating that the vulnerability can be exploited over the network with low attack complexity and privileges. The weakness associated with this vulnerability is CWE-915.

Defensive priority

High priority due to CVSS score of 9.9 and potential for privilege escalation.

Recommended defensive actions

Apply patches to JetBrains Hub installations to bring them up to date with the latest security fixes.
Review and update inventory of JetBrains Hub installations to ensure all instances are identified and accounted for.
Implement compensating controls, such as enhanced monitoring and access restrictions, to limit exposure until patches can be applied.
Verify the integrity of authentication details and accounts within JetBrains Hub to detect any potential exploitation attempts.
Monitor JetBrains Hub logs and security events for suspicious activity indicative of exploitation attempts.

Evidence notes

The primary evidence for this vulnerability comes from the CVE record and the NVD detail page. The CVE record provides an overview of the vulnerability, including its description, CVSS score, and affected products. The NVD detail page offers additional information, such as the CVSS vector and weakness details. Affected products include JetBrains Hub versions before 2026.1.13757, 2025.3.148033, 2025.2.148048, 2025.1.148120, 2024.3.148430, and 2024.2.148429. Defenders should verify the versions of JetBrains Hub in their environment against these versions to assess exposure.

Official resources

This article is AI-assisted and based on the supplied source corpus. It aims to provide a factual and neutral overview of the CVE-2026-56142 vulnerability, focusing on defensive actions and risk mitigation strategies.