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PatchSiren cyber security CVE debrief

CVE-2026-86479 JetBrains CVE debrief

PatchSiren debrief for CVE-2026-86479, a high-severity vulnerability in JetBrains YouTrack. This vulnerability, identified as CVE-2026-86479, affects JetBrains YouTrack, potentially allowing access to restricted REST API resources via IDOR. The vulnerability has a CVSS score of 8.1 and is considered high severity. Defenders responsible for JetBrains YouTrack deployments should assess exposure and prioritize verification of affected versions and potential impact. The CVE record and NVD entry provide limited information about the vulnerability, and further verification is required to determine affected versions and potential impact.

Vendor
JetBrains
Product
YouTrack
CVSS
HIGH 8.1
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 responsible for JetBrains YouTrack deployments should assess exposure and prioritize verification of affected versions and potential impact.

Why it matters

CVE-2026-86479 is a high-severity vulnerability in JetBrains YouTrack that allows access to restricted REST API resources via IDOR. Defenders responsible for JetBrains YouTrack deployments should assess exposure and prioritize verification of affected versions and potential impact.

  • Verification of affected versions is required to determine potential impact.
  • Potential unauthorized access to restricted REST API resources may occur if patches or compensating controls are not applied.
  • Defenders should review incident response plans to address potential exploitation.

Technical summary

CVE-2026-86479 is a high-severity vulnerability in JetBrains YouTrack, allowing access to restricted REST API resources via IDOR. The vulnerability has a CVSS score of 8.1 and is considered high severity. Affected product deployments exist in managed environments and require verification. Review of the supplied official advisory or CVE record is necessary to validate affected scope, severity, and vendor guidance. Planning for vendor-supported updates or mitigations through normal change control is crucial where exposure is confirmed. Compensating controls for are

Defensive priority

Defenders should prioritize verification of affected versions and apply patches or compensating controls.

Recommended defensive actions

  • Verify affected versions of JetBrains YouTrack and apply patches or compensating controls.
  • Monitor for potential unauthorized access to restricted REST API resources.
  • Review and update incident response plans to address potential exploitation.

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. Further verification is required to determine affected versions and potential impact.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-86479 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-86479

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

  • CVE-2026-86479 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-86479

    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.