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PatchSiren cyber security CVE debrief

CVE-2026-57375 FluxBuilder CVE debrief

A Missing Authorization vulnerability in FluxBuilder MStore API mstore-api allows Exploiting Incorrectly Configured Access Control Security Levels. This issue affects MStore API: from n/a through <= 4.18.4. The vulnerability has a CVSS score of 6.5 and is classified as MEDIUM severity. Users of MStore API by FluxBuilder, especially those using versions up to 4.18.4, should be aware of this vulnerability and take necessary actions to secure their installations.

Vendor
FluxBuilder
Product
MStore API
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-13
Original CVE updated
2026-07-13
Advisory published
2026-07-13
Advisory updated
2026-07-13

Who should care

Users of MStore API by FluxBuilder, especially those using versions up to 4.18.4, should be aware of this vulnerability and take necessary actions to secure their installations. Operators, platform administrators, vulnerability management teams, and security teams may be impacted.

Technical summary

The CVE-2026-57375 vulnerability is related to a Missing Authorization issue in the MStore API by FluxBuilder, which could allow for Exploiting Incorrectly Configured Access Control Security Levels. The vulnerability has a CVSS score of 6.5 and is classified as MEDIUM severity.

Defensive priority

MEDIUM

Recommended defensive actions

  • Inventory and verify MStore API version
  • Apply vendor remediation or patches
  • Implement compensating controls and monitoring
  • Exception tracking and retest
  • Review relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record was published on 2026-07-13T10:16:30.570Z and has not been modified since then. The NVD entry is currently being reviewed. Evidence and details are limited to public sources and vendor statements. Defensive verification tasks are recommended to confirm affected scope and exposure.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-57375 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-57375

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

  • CVE-2026-57375 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-57375

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

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.