EUVD-2026-70515Severity by source
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/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
Network-reachable, no authentication required, no confidentiality or availability impact; only low integrity loss from silent field truncation or omission.
Primary rating from Vendor (mongodb).
CVSS VectorVendor: mongodb
Lifecycle Timeline
3DescriptionCVE.org
An incorrect numeric conversion in the JSON parsing component of the MongoDB C Driver's BSON library may cause an unusually large text value to be silently shortened, or the corresponding field to be omitted, while the parsing operation still reports success and returns no error. An unauthenticated party who can supply the input processed by an application that uses this component may cause that application to hold data that does not match what was submitted, which may result in unintended alteration of data.
AnalysisAI
Silent data corruption in MongoDB C Driver's BSON JSON parsing component allows unauthenticated network attackers to cause applications to silently store truncated or dropped numeric fields. CWE-681 (incorrect conversion between numeric types) triggers when an oversized text-encoded numeric value is parsed: the driver returns a success result while the resulting BSON silently shortens or omits the field entirely. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The target application must use the MongoDB C Driver's JSON-to-BSON parsing component to process input that originates, at least partially, from an external source. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N) scores 6.3 (Medium). … 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 | Monitor the MongoDB JIRA ticket CDRIVER-6407 (https://jira.mongodb.org/browse/CDRIVER-6407) and the official MongoDB C Driver GitHub releases page for a patched version; no specific fix version is confirmed in available data, so citing a version number here would be speculative. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-681 – Incorrect Conversion between Numeric Types
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External POC / Exploit Code
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