EUVD-2026-67931
GHSA-g954-97w2-99wv
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Low-privileged network access sufficient; scope changes because downstream SQL clients lose availability, not just mongosqld itself.
Primary rating from Vendor (mongodb).
CVSS VectorVendor: mongodb
Lifecycle Timeline
3DescriptionCVE.org
A database user able to create a view in a namespace that MongoDB Connector for BI samples can cause the schema-sampling routine to stop functioning by defining a view whose evaluation reliably fails. The sampling logic classifies the resulting server message as transient and, after the configured retries are exhausted, proceeds without a valid result, ending the schema refresh routine. The mongosqld process continues running without a usable schema, so SQL clients are unable to obtain results until an operator removes the view or excludes its namespace from sampling.
AnalysisAI
Schema-sampling denial-of-service in MongoDB Connector for BI allows a low-privileged database user to permanently halt the schema-refresh routine by creating a view in a sampled namespace that reliably fails on evaluation. The mongosqld process misclassifies the persistent failure as transient, exhausts its retry budget, then continues running with no valid schema - leaving all downstream SQL clients unable to retrieve results until an operator manually removes the offending view or excludes the namespace. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must hold a valid MongoDB database account with permission to CREATE VIEW in at least one namespace that mongosqld's sampling configuration includes. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.3 accurately reflects the real-world severity: the attack is network-reachable (AV:N), requires no special configuration (AC:L, AT:N), demands only low database privileges (PR:L), and produces high availability impact on both the vulnerable component and subsequent SQL client systems (VA:H, SA:H). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Consult the MongoDB BI Connector release notes at https://www.mongodb.com/docs/bi-connector/current/release-notes/ for a patched release; no exact fix version was confirmed in the provided intelligence, so patch availability should be treated as 'per vendor advisory pending version confirmation.' As an immediate compensating control, restrict view-creation privileges in MongoDB namespaces that mongosqld is configured to sample, limiting this right to trusted administrative users only - note this may conflict with application workflows that rely on user-defined views. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Immediately restrict view creation permissions for low-privileged database users and establish a monitoring alert for schema-refresh failures in the mongosqld process. …
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External POC / Exploit Code
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