PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-86486 JetBrains CVE debrief

A low-severity vulnerability was found in JetBrains YouTrack before version 2026.2.18634. The generic VCS webhook handler fails to open when its secret is blank. This issue has a CVSS score of 3.7 and is classified as a low-severity vulnerability. Defenders responsible for YouTrack installations should verify and update their systems to prevent potential issues. The CVE record and NVD entry provide limited information about the vulnerability. Further verification is required to determine the impact and affected versions.

Vendor
JetBrains
Product
YouTrack
CVSS
LOW 3.7
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 installations should verify and update their systems to prevent potential issues. This includes reviewing and configuring the generic VCS webhook handler secret. Security teams and vulnerability management teams should also review the CVE record and NVD entry to determine the impact and affected versions.

Why it matters

A low-severity vulnerability was found in JetBrains YouTrack before version 2026.2.18634. The generic VCS webhook handler fails to open when its secret is blank. Defenders responsible for YouTrack installations should verify and update their systems.

  • Defenders need to verify YouTrack installations to prevent potential issues
  • Update priority is low due to CVSS score of 3.7

Technical summary

The generic VCS webhook handler in JetBrains YouTrack before 2026.2.18634 fails to open when its secret is blank. This issue has a CVSS score of 3.7 and is classified as a low-severity vulnerability. The vulnerability affects JetBrains YouTrack installations and defenders should verify and update their systems to prevent potential issues. The CVE record and NVD entry provide limited information about the vulnerability.

Defensive priority

Defenders should verify and update YouTrack installations to prevent potential issues.

Recommended defensive actions

  • Verify YouTrack installations and update to version 2026.2.18634 or later
  • Review and configure the generic VCS webhook handler secret
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

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

Sources and references

Verified primary and authoritative sources

  • CVE-2026-86486 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-86486

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

  • CVE-2026-86486 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-86486

    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.