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CVE-2026-75047 JetBrains CVE debrief

A denial-of-service (DoS) attack was possible in JetBrains YouTrack before version 2026.2.18177 via a decompression bomb in the import endpoint. This CVE record was published on 2026-08-17T16:17:51.757Z and was last modified on 2026-09-15T17:47:56.213Z. The NVD entry is currently Analyzed. The vulnerability has a CVSS score of 6.5, indicating a medium severity level. Defenders should be aware of the potential impact and take necessary actions to prevent exploitation. The CVE Program and NVD provide official records and assessments of the vulnerability.

Vendor
JetBrains
Product
YouTrack
CVSS
MEDIUM 6.5
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 deployments should assess exposure and apply the vendor-provided patch to prevent DoS attacks. This includes verifying the version of YouTrack being used, checking for any existing mitigations or compensating controls, and applying the patch as soon as possible. Additionally, defenders should monitor the import endpoint for suspicious activity and review relevant logs to

Why it matters

Defenders should prioritize verifying exposure in their YouTrack deployments and applying the vendor-provided patch to prevent DoS attacks. The vulnerability has a CVSS score of 6.5 and can be exploited via a decompression bomb in the import endpoint.

  • Verify exposure in YouTrack deployments
  • Apply patches to prevent DoS attacks
  • Monitor import endpoint for suspicious activity

Technical summary

A DoS attack was possible in JetBrains YouTrack before version 2026.2.18177 via a decompression bomb in the import endpoint. The vulnerability has a CVSS score of 6.5 and a CVSS vector of CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H. This vulnerability can be exploited by an attacker with low privileges, and it has a high impact on availability. The vulnerability is caused by a decompression bomb in the import endpoint, which can lead to a denial-of-service attack. Defenders should prioritize verifying exposure in their YouTrack deployments and applying the vendor

Defensive priority

Defenders should prioritize verifying exposure in their YouTrack deployments and applying the vendor-provided patch.

Recommended defensive actions

  • Verify YouTrack deployment version and check if it is vulnerable
  • Apply the vendor-provided patch to prevent DoS attacks
  • Monitor YouTrack import endpoint for suspicious activity

Evidence notes

The CVE record and NVD detail page provide information on the vulnerability, including its CVSS score and vector. A vendor advisory is also available.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-75047 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-75047

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

  • CVE-2026-75047 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-75047

    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.