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PatchSiren cyber security CVE debrief

CVE-2026-86500 JetBrains CVE debrief

A vulnerability in JetBrains YouTrack before 2026.1.14047 allows a user with project update permissions to grant themselves Project Admin privileges due to a missing escalation check. This issue is classified as CWE-266. The vulnerability requires verification of user permissions and prompt patch application to prevent potential privilege escalation attacks. Defenders and administrators of JetBrains YouTrack instances should assess their exposure and verify user permissions. The CVE record and NVD entry provide limited information about the vulnerability, with the primary source being JetBrains' own security issues page. The vulnerability has a CVSS score of 5.5 and a severity of '

Vendor
JetBrains
Product
YouTrack
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-07
Original CVE updated
2026-09-07
Advisory published
2026-09-07
Advisory updated
2026-09-07

Who should care

Defenders and administrators of JetBrains YouTrack instances should assess their exposure and verify user permissions to prevent potential privilege escalation attacks.

Why it matters

Defenders should care about CVE-2026-86500 because it allows a user with project update permissions to escalate their privileges to Project Admin in JetBrains YouTrack instances before version 2026.1.14047. This vulnerability requires verification of user permissions and prompt patch application to prevent potential privilege escalation attacks.

  • Potential privilege escalation for users with project update permissions.
  • Increased risk of unauthorized access to sensitive project information.
  • Possible lateral movement within the project environment.
  • Need for verification of user permissions and patch application.

Technical summary

The vulnerability exists in JetBrains YouTrack before version 2026.1.14047. A user with project update permissions can grant themselves Project Admin privileges due to a missing escalation check. This issue is classified as CWE-266. The vulnerability requires verification of user permissions and prompt patch application to prevent potential privilege escalation attacks. The CVE record and NVD entry provide limited information about the vulnerability, with the primary source being JetBrains' own security issues page.

Defensive priority

Defenders should prioritize verifying and limiting user permissions in YouTrack instances, especially for users with project update permissions, to prevent potential privilege escalation.

Recommended defensive actions

  • Verify and limit user permissions in YouTrack instances, especially for users with project update permissions.
  • Monitor YouTrack instance configurations and user activities for potential privilege escalation attempts.
  • Apply the patch or upgrade to JetBrains YouTrack version 2026.1.14047 or later.

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability, with the primary source being JetBrains' own security issues page. The CVE record was published on 2026-09-07T17:17:28.443Z and has not been modified since then. The vulnerability exists in JetBrains YouTrack before version 2026.1.14047. A user with project update permissions can grant themselves Project Admin privileges due to a missing escalation check. This issue requires verification of user

Sources and references

Verified primary and authoritative sources

  • CVE-2026-86500 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-86500

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-86500 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-86500

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.