CVE-2026-40984
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Denial-of-Service in Micrometer

Publication date: 2026-06-09

Last updated on: 2026-06-23

Assigner: VMware

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.

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Meta Information

Published
2026-06-09
Last Modified
2026-06-23
Generated
2026-06-29
AI Q&A
2026-06-09
EPSS Evaluated
2026-06-28
NVD
CVE-2026-40984
EUVD
EUVD-2026-35320

Affected Vendors & Products

Showing 13 associated CPEs
Vendor Product Version / Range
micrometer micrometer-core From 1.9.0 (inc) to 1.9.17 (inc)
micrometer micrometer-core From 1.13.0 (inc) to 1.13.18 (inc)
micrometer micrometer-core From 1.14.0 (inc) to 1.14.15 (inc)
micrometer micrometer-core From 1.15.0 (inc) to 1.15.11 (inc)
micrometer micrometer-core From 1.16.0 (inc) to 1.16.5 (inc)
micrometer micrometer-jetty11 From 1.16.0 (inc) to 1.16.5 (inc)
micrometer micrometer-jetty11 From 1.15.0 (inc) to 1.15.11 (inc)
micrometer micrometer-jetty11 From 1.14.0 (inc) to 1.14.15 (inc)
micrometer micrometer-jetty11 From 1.13.0 (inc) to 1.13.18 (inc)
micrometer micrometer-jetty12 From 1.16.0 (inc) to 1.16.5 (inc)
micrometer micrometer-jetty12 From 1.15.0 (inc) to 1.15.11 (inc)
micrometer micrometer-jetty12 From 1.14.0 (inc) to 1.14.15 (inc)
micrometer micrometer-jetty12 From 1.13.0 (inc) to 1.13.18 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-400 The product does not properly control the allocation and maintenance of a limited resource.

Attack-Flow Graph

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Executive Summary

CVE-2026-40984 is a denial-of-service (DoS) vulnerability in Micrometer HTTP server instrumentations. It allows an attacker to send specially crafted HTTP requests that can cause a DoS condition in applications using vulnerable versions of Micrometer.

This vulnerability affects applications using io.micrometer:micrometer-core, micrometer-jetty11, or micrometer-jetty12 with HTTP server instrumentations configured to record metrics.

Affected versions include multiple releases of micrometer-core from 1.9.0 through 1.16.5 and corresponding versions of micrometer-jetty11 and micrometer-jetty12.

Impact Analysis

This vulnerability can impact you by causing a denial-of-service (DoS) condition in your application. An attacker can exploit this by sending specially crafted HTTP requests that disrupt the normal operation of your application.

The DoS condition can lead to application unavailability or degraded performance, potentially affecting users and services relying on the affected application.

Mitigation Strategies

To mitigate the CVE-2026-40984 vulnerability, users should upgrade to the fixed versions of Micrometer.

  • Upgrade micrometer-core to 1.16.6 if using 1.16.x versions.
  • Upgrade micrometer-core to 1.15.12 if using 1.15.x versions.
  • Upgrade micrometer-core to 1.14.16 if using 1.14.x versions.
  • Upgrade micrometer-core to 1.13.19 if using 1.13.x versions.
  • Upgrade micrometer-core to 1.9.18 if using 1.9.x versions.

Versions 1.14.x and earlier require Enterprise Support for the fix. No additional mitigation steps are necessary beyond upgrading.

Compliance Impact

The provided information does not specify any direct impact of this vulnerability on compliance with common standards and regulations such as GDPR or HIPAA.

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