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CVE-2026-50008 parse-community CVE debrief

CVE-2026-50008 is a security bypass vulnerability in Parse Server, an open-source backend that can be deployed to any infrastructure that can run Node.js. From version 9.8.0 to before version 9.9.1-alpha.3, the routeAllowList server option restricts external client access to a configured list of REST API routes. However, the check is only enforced as Express middleware against the outer HTTP request URL, allowing an external caller whose outer route matches batch to issue batch sub-requests to any REST API route that the operator omitted from the allow-list. Authentication, ACL, CLP, and other inner-route authorization controls still apply — only the operator-configured route firewall is bypassed. This issue has been patched in version 9.9.1-alpha.3.

Vendor
parse-community
Product
parse-server
CVSS
MEDIUM 6.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-12
Original CVE updated
2026-06-15
Advisory published
2026-06-12
Advisory updated
2026-06-15

Who should care

Users of Parse Server from version 9.8.0 to before version 9.9.1-alpha.3 should apply the patch to prevent potential security bypass.

Technical summary

The vulnerability exists in the routeAllowList server option in Parse Server. The option restricts external client access to a configured list of REST API routes. However, the check is only enforced as Express middleware against the outer HTTP request URL. This allows an external caller whose outer route matches batch to issue batch sub-requests to any REST API route that the operator omitted from the allow-list.

Defensive priority

MEDIUM

Recommended defensive actions

  • Apply the patch in version 9.9.1-alpha.3 or later.
  • Review and update the routeAllowList server option to ensure it includes all necessary REST API routes.
  • Monitor for potential security bypass attempts.

Evidence notes

CVE-2026-50008 has a CVSS score of 6.9 and is classified as MEDIUM severity.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50008 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50008

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

  • CVE-2026-50008 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50008

    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.