EUVD-2026-72944
GHSA-rchq-qm85-w78g
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/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 complexity, requires readWrite authentication (PR:L); impact is availability-only (A:H) with no confidentiality or integrity exposure.
Primary rating from Vendor (mongodb).
CVSS VectorVendor: mongodb
Lifecycle Timeline
3DescriptionCVE.org
A security issue was discovered in MongoDB where an authenticated user with readWrite privileges could crash the mongod server process. By specifying a custom WiredTiger storage configuration option with an incompatible value during collection creation, a user could cause a type confusion in the storage engine layer. When documents were subsequently read from the misconfigured collection, the resulting mismatch in expected data format led to corrupted memory interpretation and a server crash. The crafted collection configuration persists across restarts, requiring manual operator intervention to remediate.
Articles & Coverage 1
AnalysisAI
MongoDB Server 8.3.x exposes a type confusion (CWE-843) in its WiredTiger storage engine layer, allowing any authenticated user with readWrite privileges to crash the mongod process and keep it in a crash-loop. By creating a collection with a crafted, incompatible WiredTiger storage configuration option, the attacker causes the storage engine to misinterpret memory layout when subsequent reads are issued against that collection. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated MongoDB session with at minimum the readWrite built-in role (or a custom role granting createCollection and find on any 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/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N accurately reflects the threat model: network-reachable, low complexity, no special attack requirements, but gated behind low-privilege authentication (readWrite role). … 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 to MongoDB Server 8.3.9, which contains the vendor-supplied fix per EUVD-2026-72944 and https://jira.mongodb.org/browse/SERVER-130495. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: inventory all MongoDB 8.3.x deployments and audit which applications and user accounts have readWrite database privileges to understand exposure scope. …
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External POC / Exploit Code
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