EUVD-2026-70508
GHSA-9xr7-hhfx-wh4c
Severity 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
AC:H reflects the required caller-configured truncation prerequisite; only low integrity impact matches vendor VI:L; no confidentiality or availability impact.
Primary rating from Vendor (mongodb).
CVSS VectorVendor: mongodb
Lifecycle Timeline
2DescriptionCVE.org
A memory-handling error in the BSON-to-JSON conversion helpers of the MongoDB C Driver can write a small number of bytes past the end of a heap buffer when a binary field is encoded and the output is cut short at a caller-configured length limit. A party who supplies the document content, with no privileges on the application that links the driver, may cause a small amount of data outside the intended buffer to be altered.
AnalysisAI
Heap buffer out-of-bounds write in the MongoDB C Driver's BSON-to-JSON conversion helpers allows an unauthenticated party who supplies document content to corrupt a small number of bytes past the end of a heap-allocated buffer. The overflow is triggered specifically when a binary BSON field is being encoded and the caller has configured a maximum output length that causes the conversion to be cut short. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Two specific conditions must both be met: (1) the application links against an affected version of the MongoDB C Driver and calls a BSON-to-JSON conversion function with a caller-configured maximum output length (truncation limit) - applications that call the conversion without a length cap are not vulnerable; (2) the attacker controls the content of the BSON document being converted and can include a binary-type field. … 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) scores 6.3, reflecting a genuine but bounded risk. … 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 | No vendor-released patch version is confirmed in the available input data; the upstream fix is tracked in JIRA issue CDRIVER-6410 (https://jira.mongodb.org/browse/CDRIVER-6410) - monitor that ticket and the mongodb/mongo-c-driver GitHub releases page for a patched build. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-787 – Out-of-bounds Write
View allSame technique Buffer Overflow
View allVendor StatusVendor
SUSE
Severity: Moderate| Product | Status |
|---|---|
| openSUSE Tumbleweed | Fixed |
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