CVE-2026-86488: CWE-639 in JetBrains YouTrack
Description
CVE-2026-86488 is an Insecure Direct Object Reference (iDOR) vulnerability in JetBrains YouTrack versions before 2026.2.18634. It allows unauthorized access to private saved searches via the watchRules and issueListConfig endpoints. The vulnerability has a medium severity with a CVSS score of 6.5, indicating a network attack vector with low complexity and no user interaction required. Confidentiality impact is high, but integrity and availability are not affected.
CVSS v3.1
Score 6.5medium
Affected software
JetBrains
YouTrack
pkg:github/jetbrains/YouTrackRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-86488) in JetBrains YouTrack prior to version 2026.2.18634 is classified as CWE-639 (Authorization Bypass Through User-Controlled Key). It involves insecure direct object references via the watchRules and issueListConfig endpoints, which expose private saved searches to unauthorized users. The CVSS 3.1 base score is 6.5, reflecting a network attack vector with low attack complexity and requiring low privileges but no user interaction. The impact is a high confidentiality breach without affecting integrity or availability. No known exploits in the wild have been reported. The product is not a cloud service, and no official patch links were provided in the input data.
Potential Impact
Successful exploitation allows an attacker with low privileges to access private saved searches of other users, leading to a high confidentiality impact. There is no impact on data integrity or availability. This could result in unauthorized disclosure of sensitive information stored in saved searches.
Mitigation Recommendations
A fix is available in JetBrains YouTrack version 2026.2.18634. Users should upgrade to this version or later to remediate the vulnerability. Since the product is not a cloud service, remediation depends on user action to apply the update. Patch status is confirmed by the version information provided. No additional vendor advisory content was supplied.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-09-07T16:13:36.500Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a9ee859acd9273b49f0e410
Added to database: 09/07/2026, 16:37:45 UTC
Last enriched: 09/15/2026, 01:18:03 UTC
Last updated: 10/22/2026, 01:15:26 UTC
Views: 75
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