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MongoDB Server CVE-2026-18702

| EUVDEUVD-2026-56918 MEDIUM
Improper Privilege Management (CWE-269)
2026-08-11 mongodb GHSA-j7rj-q56q-v829
5.3
CVSS 4.0 · Vendor: mongodb
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Severity by source

Vendor (mongodb) PRIMARY
5.3 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L/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
vuln.today AI
6.4 MEDIUM

Network-reachable with low privileges; scope changes because server-wide logging is affected beyond the authenticated user's database, yielding S:C with limited integrity and availability impact.

3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L

Primary rating from Vendor (mongodb).

CVSS VectorVendor: mongodb

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

3
Analysis Generated
Aug 11, 2026 - 23:02 vuln.today
Patch available
Aug 11, 2026 - 20:19 EUVD
CVE Published
Aug 11, 2026 - 18:43 cve.org
MEDIUM 5.3

DescriptionCVE.org

An issue in MongoDB Server could allow an authenticated user with limited, database-scoped privileges to modify diagnostic logging settings that affect the entire server rather than just the intended database. This could allow suppression of diagnostic logging server-wide, potentially obscuring unauthorized activity, or degrade operational monitoring by causing excessive log volume.

AnalysisAI

Privilege boundary enforcement failure in MongoDB Server allows an authenticated user holding only database-scoped privileges to modify diagnostic logging parameters at the server-wide level. Affected versions span MongoDB 7.0 (before 7.0.40), 8.0 (before 8.0.29), and 8.3 (before 8.3.8). …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain low-privilege MongoDB credentials
Delivery
Authenticate to network-accessible MongoDB Server
Exploit
Issue server-wide diagnostic log suppression command
Execution
Conduct unauthorized data access or privilege escalation
Impact
Evade detection due to silenced audit logs

Vulnerability AssessmentAI

Exploitation Exploitation requires an authenticated MongoDB session with at least low-level (database-scoped) privileges - unauthenticated access is not sufficient. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 5.3 (AV:N/AC:L/AT:N/PR:L/UI:N) reflects a network-reachable, low-complexity flaw requiring only low privileges - no user interaction needed. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker who has compromised a low-privilege MongoDB database account - for example, a read/write user for a single application database - authenticates to the server and issues a diagnostic log configuration command that suppresses server-wide logging. With audit trails silenced, the attacker then proceeds with lateral data access or privilege escalation while generating no log evidence, significantly increasing dwell time before detection. …
Remediation The primary remediation is to upgrade MongoDB Server to a fixed release: 7.0.40 or later for the 7.0 branch, 8.0.29 or later for the 8.0 branch, or 8.3.8 or later for the 8.3 branch, per vendor guidance referenced in EUVD-2026-56918 and SERVER-130198. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

CVE-2026-18691 CRITICAL
9.0 Aug 11

Credential exposure in MongoDB Server's replica-set/sharded-cluster internal authentication allows an adjacent-network a

CVE-2026-8053 HIGH
8.7 May 12

Out-of-bounds memory write in MongoDB Server's time-series collection feature enables arbitrary code execution by authen

CVE-2026-4148 HIGH
8.7 Mar 17

MongoDB Server sharded clusters are vulnerable to use-after-free memory corruption when authenticated users with read pe

CVE-2026-9740 HIGH
8.7 Jun 09

Remote unauthenticated denial-of-service in MongoDB Server's BSON validation layer allows attackers to crash the mongod

CVE-2026-18697 HIGH
8.7 Aug 11

Unauthenticated denial of service in MongoDB Server's aggregation framework allows remote attackers to crash the mongos

CVE-2026-9742 HIGH
8.2 Jun 09

Pre-authentication denial-of-service in MongoDB Server allows unauthenticated remote clients to crash the database proce

CVE-2026-8336 HIGH
7.7 May 13

Authenticated users can crash MongoDB Server by chaining specific server-side JavaScript operations ($_internalJsEmit or

CVE-2026-18692 HIGH
7.7 Aug 11

Use-after-free in MongoDB Server's timeseries bucket lifecycle handling allows an authenticated user with write-level pr

CVE-2026-18706 HIGH
7.5 Aug 11

Use-after-free memory corruption in MongoDB Server's $graphLookup aggregation stage allows an authenticated high-privile

CVE-2026-9753 HIGH
7.2 Jun 09

Memory disclosure and denial-of-service in MongoDB Server allows any authenticated user with aggregate command privilege

CVE-2026-18712 HIGH
7.2 Aug 11

Queryable Encryption maintenance operations in MongoDB Server permit an authenticated low-privileged database user to ca

CVE-2026-18690 HIGH
7.2 Aug 11

Authorization bypass in MongoDB Server allows an authenticated user holding only a limited database-scoped role to issue

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CVE-2026-18702 vulnerability details – vuln.today

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