CVE-2026-1850
Published: 10 February 2026
Summary
CVE-2026-1850 is a medium-severity Allocation of Resources Without Limits or Throttling (CWE-770) vulnerability in Mongodb Mongodb. Its CVSS base score is 6.5 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Application or System Exploitation (T1499.004); ranked at the 19.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
This control implements explicit throttling on session allocation, addressing the weakness of allocating resources without limits.
Plan testing exercises resource allocation limits and throttling during simulated failures, directly addressing weaknesses that allow unbounded resource use.
Contingency plan updates ensure recovery strategies address unbounded resource allocation, making it harder for attackers to exploit lack of throttling to cause prolonged outages.
Provides continuity when unbounded resource allocation at the primary site leads to exhaustion and downtime.
Alternate services allow operations to continue when primary allocation of resources lacks limits or throttling.
Explicit planning of security-related actions requires defining limits, windows, and resource allocations, making allocation without throttling far less likely.
Measures of performance include tracking allocation behavior and throttling effectiveness, reducing the window for resource exhaustion attacks.
Imposes an inactivity-based limit on network resource allocation, throttling the number of concurrently held connections.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Direct mapping to application exploitation causing endpoint DoS via crafted queries exhausting Query Planner memory.
NVD Description
Complex queries can cause excessive memory usage in MongoDB Query Planner resulting in an Out-Of-Memory Crash.
Deeper analysisAI
CVE-2026-1850 affects MongoDB, specifically the Query Planner component, where complex queries can trigger excessive memory usage leading to an out-of-memory crash. Published on 2026-02-10, this vulnerability is categorized under CWE-770 (Allocation of Resources Without Limits or Throttling) and carries a CVSS v3.1 base score of 6.5 (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
An attacker with low privileges can exploit this vulnerability over the network with low complexity and no user interaction required. Exploitation involves sending crafted complex queries that overwhelm memory allocation in the Query Planner, resulting in a denial-of-service condition through an out-of-memory crash, with high impact on availability but no impact on confidentiality or integrity.
Mitigation details are available in the MongoDB advisory referenced at https://jira.mongodb.org/browse/SERVER-114126.
Details
- CWE(s)