CVE-2026-109302 parse-community CVE debrief

Who should care

Defenders responsible for Parse Server deployments should assess exposure and apply patches to prevent potential misuse of persisted queries. This includes operators, platform administrators, vulnerability management teams, and security teams who need to verify exposure and apply patches for Parse Server versions 8.2.2 before 8.6.94 and 9.0.0 before 9.10.1-alpha.14.

Why it matters

CVE-2026-109302 is a medium-severity vulnerability in Parse Server that allows unauthenticated attackers to retrieve the schema, including private class and field names, by replaying cached introspection queries. Defenders should prioritize verifying exposure and applying patches for Parse Server versions 8.2.2 before 8.6.94 and 9.0.0 before 9.10.1-alpha.14.

• Potential disclosure of private class and field names in Parse Server schema
• Unauthenticated attackers can replay cached introspection queries to retrieve schema information
• Verification of exposure and patch application is necessary to prevent potential misuse

Technical summary

Parse Server 8.2.2 before 8.6.94 and 9.0.0 before 9.10.1-alpha.14 applies its GraphQL introspection control only to operation text sent directly with a request, not to operations resolved from Apollo Server's automatic persisted query cache. Unauthenticated attackers holding the public Application Id and client key can replay an introspection query previously cached by a master or maintenance key client to retrieve the schema, including private class and field names.

Defensive priority

Defenders should prioritize verifying exposure and applying patches for Parse Server versions 8.2.2 before 8.6.94 and 9.0.0 before 9.10.1-alpha.14.

Recommended defensive actions

• Verify exposure of Parse Server instances to unauthenticated introspection queries
• Apply patches for Parse Server versions 8.2.2 before 8.6.94 and 9.0.0 before 9.10.1-alpha.14
• Monitor for potential misuse of persisted queries
• 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
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source item provide details on the GraphQL schema disclosure vulnerability in Parse Server. The NVD entry is currently not provided. The vulnerability allows unauthenticated attackers holding the public Application Id and client key to replay an introspection query previously cached by a master or maintenance key client to retrieve the schema, including private class and field names. Defenders should verify exposure and apply patches for Parse Server versions 8.2.2 before 8.6.94 and 9.0.0 before 9.10.1-alpha.14.

Sources and 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.