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PatchSiren cyber security CVE debrief

CVE-2026-75048 JetBrains CVE debrief

CVE-2026-75048 is a stored XSS vulnerability in JetBrains YouTrack before 2026.2.18068. The vulnerability occurs via the fenced code-block language label. An attacker could potentially inject malicious code, which would be executed when other users view the affected content. Defenders should assess exposure and apply remediation to prevent potential code execution and data theft. The vulnerability requires verification of the YouTrack instance version and exposure, followed by necessary remediation through version upgrade. This CVE record was published on 2026-08-17T16:17:51.870Z and has not been modified since then.

Vendor
JetBrains
Product
YouTrack
CVSS
HIGH 8.2
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-17
Original CVE updated
2026-09-15
Advisory published
2026-08-17
Advisory updated
2026-09-15

Who should care

Defenders responsible for JetBrains YouTrack instances, especially those with public access or used by multiple users, should assess exposure and apply remediation.

Why it matters

CVE-2026-75048 is a high-severity stored XSS vulnerability in JetBrains YouTrack. Defenders should prioritize verifying exposure and applying remediation to prevent potential code execution and data theft. The vulnerability requires verification of the YouTrack instance version and exposure, followed by necessary remediation through version upgrade.

  • Potential code execution in user browsers
  • Possible data theft or unauthorized actions
  • Required verification of YouTrack instance version and exposure
  • Necessary remediation through version upgrade

Technical summary

CVE-2026-75048 is a stored XSS vulnerability in JetBrains YouTrack before 2026.2.18068. The vulnerability occurs via the fenced code-block language label. An attacker could potentially inject malicious code, which would be executed when other users view the affected content.

Defensive priority

Defenders should prioritize verifying exposure and applying remediation for JetBrains YouTrack instances, especially those with public access or used by multiple users.

Recommended defensive actions

  • Verify the version of JetBrains YouTrack and check if it's vulnerable (before 2026.2.18068).
  • Apply the remediation provided by JetBrains (upgrading to 2026.2.18068 or later).
  • Monitor YouTrack instances for potential exploitation attempts.

Evidence notes

The CVE record and NVD entry provide details on the stored XSS vulnerability in JetBrains YouTrack before 2026.2.18068. The vulnerability is related to the fenced code-block language label.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-75048 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-75048

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

  • CVE-2026-75048 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-75048

    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.