EUVD-2026-72949
GHSA-89pf-pvm7-xj92
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:L/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 but requires elevated internal MongoDB privileges (PR:H); integrity impact is high from arbitrary storage-engine writes, availability is low, and confidentiality is unaffected.
Primary rating from Vendor (mongodb).
CVSS VectorVendor: mongodb
Lifecycle Timeline
4DescriptionCVE.org
A security issue in MongoDB Server allows an authenticated user with elevated internal privileges to bypass a disabled feature gate in the applyOps command by specifying an internal replication mode value that was not intended to be client-selectable. This bypass enables execution of container operations that are disabled by default in production configurations, allowing direct storage-engine writes to arbitrary internal storage tables. The authorization check for these operations validates only the operation's namespace, not the actual storage target, enabling writes to unrelated internal metadata or other collections' data.
Articles & Coverage 1
AnalysisAI
Direct storage-engine writes to arbitrary internal MongoDB tables are possible through an authorization bypass in the applyOps command affecting MongoDB Server 8.3.0 through 8.3.8. An authenticated user holding elevated internal MongoDB privileges can specify a client-inaccessible internal replication mode value, circumventing a disabled production feature gate and enabling container operations that are suppressed by default. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated session with elevated internal MongoDB privileges - the CVSS PR:H metric confirms that standard read/write or dbAdmin roles are insufficient; only accounts holding internal roles such as __system or equivalent replication-tier privileges can supply the necessary replication mode parameter value to applyOps. … 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:H/UI:N/VC:N/VI:H/VA:L) confirms network-reachable exploitation with no attack complexity, but critically requires high privilege (PR:H), which substantially narrows the realistic threat surface. … 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 | Upgrade MongoDB Server to version 8.3.9 or later, which resolves the feature-gate bypass in the applyOps command. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all deployments running MongoDB Server 8.3.0 through 8.3.8 and audit administrative access controls to limit exposure. …
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External POC / Exploit Code
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