EUVD-2026-56904
GHSA-rf6p-955q-5j7w
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/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 via standard MongoDB port, low-privilege auth required, no interaction needed; high availability loss from crash, low confidentiality from bounded memory leak, no integrity impact.
Primary rating from Vendor (mongodb).
CVSS VectorVendor: mongodb
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/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
Lifecycle Timeline
3DescriptionCVE.org
An issue in MongoDB Server's aggregation framework could allow an authenticated user to trigger an out-of-bounds memory read by providing a specially formed numeric parameter in a certain aggregation pipeline stage. This could result in a server crash (denial of service) and may potentially expose a limited amount of memory contents.
AnalysisAI
Out-of-bounds memory read in MongoDB Server's aggregation framework allows an authenticated attacker to crash the database server or expose limited memory contents by submitting a specially crafted numeric parameter within a specific aggregation pipeline stage. The CVSS 4.0 score of 7.1 reflects dual impact: high availability loss from server crash (VA:H) and low-level confidentiality exposure from adjacent memory leakage (VC:L). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid MongoDB account with at least low-privilege access sufficient to submit aggregation pipeline queries - typically a role with 'find' or higher permissions on a database. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N) confirms network exploitability with low attack complexity and no special prerequisites beyond low-privilege authentication. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with a valid low-privilege MongoDB account - such as a read-only application credential, a shared developer account, or credentials obtained via phishing - submits a crafted aggregation pipeline query containing a malformed numeric parameter targeting the vulnerable pipeline stage. The out-of-bounds read crashes the MongoDB server process, causing a denial of service for all connected clients, or leaks a small region of in-process memory that may contain fragments of other queries or data. … |
| Remediation | A specific patched version is not confirmed in the available data - operators should monitor https://jira.mongodb.org/browse/SERVER-129617 and MongoDB's official release notes for a targeted fix version before upgrading. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Audit all MongoDB user accounts with network access and revoke unnecessary administrative or query privileges, restricting active credentials to minimum-privilege service accounts only. …
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External POC / Exploit Code
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