CyberSecBulletin
CVE-2026-40984NVD status: Awaiting Analysis

Micrometer: Uncontrolled Resource Consumption

Published Updated By the CyberSecBulletin desk

CVE-2026-40984 is a high-severity uncontrolled resource consumption vulnerability in Micrometer from Spring, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists versions 1.16.5.1, 1.15.11.1, 1.14.16 as the first without the flaw, so updating Micrometer to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.79% chance of exploitation within 30 days, higher than 57% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Micrometer to 1.16.5.1 or 1.15.11.1 or 1.14.16 or 1.13.19, whichever matches your release line, or a later version.
  2. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
SpringMicrometer1.16.0 up to, but not including, 1.16.5.1; 1.15.0 up to, but not including, 1.15.11.1; 1.14.0 up to, but not including, 1.14.16; 1.13.0 up to, but not including, 1.13.19; 1.9.0 up to, but not including, 1.9.18; 1.16.0 up to, but not including, 1.16.6; 1.15.0 up to, but not including, 1.15.11.; 1.14.0 up to, but not including, 1.14.15.11.16.5.1, 1.15.11.1, 1.14.16, 1.13.19, 1.9.18, 1.16.6
Red HatRed Hat AMQ Broker 7.13.6Not specified in the recordNot stated
Red HatRed Hat AMQ Broker 7.14.1Not specified in the recordNot stated
Red HatRed Hat build of Apache Camel 4.18.1.P1 for Spring Boot 3.5.16Not specified in the recordNot stated
Red HatRed Hat Build of Apache Camel 4.18 for Quarkus 3.33Not specified in the recordNot stated
Red HatRed Hat build of Keycloak 26.6Not specified in the recordNot stated
Red HatRed Hat build of Keycloak 26.6.5Not specified in the recordNot stated
Red HatRed Hat Data Grid 8.6.2Not specified in the recordNot stated
Red HatStreams for Apache Kafka 3.2.1Not specified in the recordNot stated
Red HatRed Hat OpenShift Dev Spaces 3.30Not specified in the recordNot stated
Red HatRed Hat AMQ ClientsNot specified in the recordNot stated
Red HatRed Hat build of Apache Camel 4 for Quarkus 3Not specified in the recordNot stated
Red HatRed Hat build of Apache Camel - HawtIO 4Not specified in the recordNot stated
Red HatRed Hat build of Apicurio Registry 3Not specified in the recordNot stated
Red HatRed Hat build of Debezium 3Not specified in the recordNot stated
Red HatRed Hat build of OptaPlanner 8Not specified in the recordNot stated
Red HatRed Hat Fuse 7Not specified in the recordNot stated
Red HatRed Hat JBoss Enterprise Application Platform Expansion PackNot specified in the recordNot stated
Red HatRed Hat OpenShift AI (RHOAI)Not specified in the recordNot stated
Red HatRed Hat OpenShift Dev SpacesNot specified in the recordNot stated
Red HatRed Hat Process Automation 7Not specified in the recordNot stated
Red Hatstreams for Apache Kafka 2Not specified in the recordNot stated

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
NoneNo data is disclosed.
Integrity
NoneNothing can be modified.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by CNA (vmware.com).

Scoring systemScoreSeverityScored by
CVSS 3.17.5HighCNA (vmware.com)
CVSS 3.17.5HighCNA

Official description

In Micrometer, it is possible for a user to provide specially crafted HTTP requests that may cause a denial-of-service (DoS) condition. Affected versions: micrometer-core 1.16.0 through 1.16.5; 1.15.0 through 1.15.11; 1.14.0 through 1.14.15; 1.13.0 through 1.13.18; 1.9.0 through 1.9.17. micrometer-jetty11 1.16.0 through 1.16.5; 1.15.0 through 1.15.11; 1.14.0 through 1.14.15; 1.13.0 through 1.13.18. micrometer-jetty12 1.16.0 through 1.16.5; 1.15.0 through 1.15.11; 1.14.0 through 1.14.15; 1.13.0 through 1.13.18.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource.

How developers prevent this class of flaw

  • Ensure that protocols have specific limits of scale placed on them.
  • Ensure that all failures in resource allocation place the system into a safe posture.

More Uncontrolled Resource Consumption vulnerabilities (CWE-400)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Micrometer

All Micrometer vulnerabilities

Recent Uncontrolled Resource Consumption vulnerabilities

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