PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-86481 JetBrains CVE debrief

CVE-2026-86481 is a medium-severity vulnerability in JetBrains YouTrack, allowing disclosure of restricted project icons due to signed URL reuse. This issue was patched in version 2026.2.18634. Defenders responsible for JetBrains YouTrack instances should assess exposure and prioritize remediation to prevent potential disclosure of sensitive information. The vulnerability's impact is limited to the disclosure of restricted project icons, and there is no evidence of it being exploited in the wild. However, defenders should verify and apply the patched version to ensure the security of their instances.

Vendor
JetBrains
Product
YouTrack
CVSS
MEDIUM 4.3
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 instances, including system administrators, security teams, and vulnerability management teams, should assess exposure and prioritize remediation. They should review and restrict access to project icons and sensitive information, and monitor for potential misuse of signed URLs.

Why it matters

CVE-2026-86481 is a medium-severity vulnerability in JetBrains YouTrack that allows disclosure of restricted project icons due to signed URL reuse. Defenders responsible for JetBrains YouTrack instances should assess exposure and prioritize remediation to prevent potential disclosure of sensitive information.

  • Potential disclosure of restricted project icons.
  • Need to verify and apply patched versions.
  • Importance of restricting access to sensitive information.

Technical summary

CVE-2026-86481 is a medium-severity vulnerability in JetBrains YouTrack, allowing disclosure of restricted project icons due to signed URL reuse. The vulnerability was patched in version 2026.2.18634. The issue arises from the improper handling of signed URLs, which can be exploited to access restricted project icons. Defenders should prioritize verifying and remediating this vulnerability in their JetBrains YouTrack instances.

Defensive priority

Defenders should prioritize verifying and remediating this vulnerability in their JetBrains YouTrack instances.

Recommended defensive actions

  • Verify and apply the patched version 2026.2.18634 or later for JetBrains YouTrack.
  • Review and restrict access to project icons and sensitive information.
  • Monitor for potential misuse of signed URLs.

Evidence notes

The CVE record and NVD entry indicate that signed URL reuse allowed disclosure of restricted project icons in JetBrains YouTrack before 2026.2.18634. The evidence is based on the official CVE Program record and the NIST NVD detail page. Defenders should verify the patched version 2026.2.18634 or later for JetBrains YouTrack and review access to project icons and sensitive information.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-86481 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-86481

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

  • CVE-2026-86481 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-86481

    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.