Description
An unauthenticated remote client can cause excessive CPU consumption on a MongoDB server by sending a specific combination of parameters to the awaitable hello command in exhaust mode. The server's handling of this combination results in a response loop that bypasses normal throttling, allowing a small number of connections to degrade server availability.
Published: 2026-07-22
Score: 6.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

An unauthenticated remote client can trigger a denial of service by sending a specially crafted awaitable hello command in exhaust mode. The server’s processing of this command causes a response loop that bypasses ordinary throttling, leading to excessive CPU consumption and degraded availability for all connections. The weakness is a classic resource exhaustion flaw, categorized as CWE‑770.

Affected Systems

MongoDB Server is affected. No specific version information was supplied in the CVE data, so any deployment of the MongoDB Server product should be treated as potentially vulnerable until further detail is available.

Risk and Exploitability

The CVSS score of 6.9 indicates a medium severity vulnerability. The EPSS score of < 1% (approximately 0.26%) indicates a low probability of exploitation, and the issue is not listed in the CISA KEV catalog. Based on the description, the attack vector is remote and does not require authentication; therefore, an attacker can initiate the exploit over the network from any location with network access to the MongoDB Server. The impact is limited to availability, but the lack of authentication and possible unrestricted access make the vulnerability potentially exploitable against production systems.

Generated by OpenCVE AI on August 3, 2026 at 23:22 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade MongoDB Server to a patched release that addresses the awaitable hello command resource exhaustion flaw.
  • If an immediate patch is unavailable, disable or restrict exhaust mode usage for the awaitable hello command in the server configuration.
  • Implement connection limits or use a firewall or load balancer to throttle the number of concurrent connections to the MongoDB Server to mitigate resource exhaustion attacks.

Generated by OpenCVE AI on August 3, 2026 at 23:22 UTC.

Tracking

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Advisories

No advisories yet.

History

Fri, 24 Jul 2026 07:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 23 Jul 2026 10:45:00 +0000

Type Values Removed Values Added
First Time appeared Mongodb
Mongodb mongodb Server
Vendors & Products Mongodb
Mongodb mongodb Server

Wed, 22 Jul 2026 20:00:00 +0000

Type Values Removed Values Added
Description An unauthenticated remote client can cause excessive CPU consumption on a MongoDB server by sending a specific combination of parameters to the awaitable hello command in exhaust mode. The server's handling of this combination results in a response loop that bypasses normal throttling, allowing a small number of connections to degrade server availability.
Title Awaitable Hello Command in Exhaust Mode Unthrottled Response Loop Leading to Denial of Service
Weaknesses CWE-770
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'}


Subscriptions

Mongodb Mongodb Server
cve-icon MITRE

Status: PUBLISHED

Assigner: mongodb

Published:

Updated: 2026-07-23T14:20:01.397Z

Reserved: 2026-06-23T18:00:19.050Z

Link: CVE-2026-13074

cve-icon Vulnrichment

Updated: 2026-07-23T14:19:58.359Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-07-22T20:16:46.057

Modified: 2026-07-23T15:33:09.233

Link: CVE-2026-13074

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-03T23:30:17Z

Weaknesses
  • CWE-770

    Allocation of Resources Without Limits or Throttling