CVE-2026-1848
Published: 10 February 2026
Summary
CVE-2026-1848 is a high-severity Allocation of Resources Without Limits or Throttling (CWE-770) vulnerability in Mongodb Mongodb. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 19.5th 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?
CVE enables remote exploitation of a public-facing MongoDB server (T1190) via unauthenticated connections to trigger application-level resource exhaustion and DoS (T1499.004).
NVD Description
Connections received from the proxy port may not count towards total accepted connections, resulting in server crashes if the total number of connections exceeds available resources. This only applies to connections accepted from the proxy port, pending the proxy protocol…
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header.
Deeper analysisAI
CVE-2026-1848 is a denial-of-service vulnerability in the MongoDB server. Connections received from the proxy port do not count toward the total accepted connections limit, which can result in server crashes when the total number of connections exceeds available resources. This issue applies only to connections accepted from the proxy port while pending the proxy protocol header. The vulnerability carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) and maps to CWE-770 (Allocation of Resources Without Limits or Throttling).
Unauthenticated remote attackers can exploit this vulnerability with low attack complexity and no user interaction. By sending a large number of connections to the proxy port before the proxy protocol header is fully processed, attackers bypass the server's connection counting mechanism, leading to resource exhaustion and server crashes that disrupt availability.
Mitigation details are documented in the MongoDB Jira ticket at https://jira.mongodb.org/browse/SERVER-114695.
Details
- CWE(s)