CVE-2026-40984: Micrometer HTTP server instrumentations DoS vulnerability

Published Jun 9, 2026
·
Updated

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.

Affected Software

4 affected components
micrometer-core>=1.16.0<=1.16.5, >=1.15.0<=1.15.11, >=1.14.0<=1.14.15, >=1.13.0<=1.13.18, >=1.9.0<=1.9.17
micrometer-jetty11>=1.16.0<=1.16.5, >=1.15.0<=1.15.11, >=1.14.0<=1.14.15, >=1.13.0<=1.13.18
micrometer-jetty12>=1.16.0<=1.16.5, >=1.15.0<=1.15.11, >=1.14.0<=1.14.15, >=1.13.0<=1.13.18
IBM Observability with Instana (Agent)<=Build 1.0.303 to 1.0.320

Event History

Jun 9, 2026
CVE Published
via MITRE·03:47 AM
Data Sourced
via MITRE·03:47 AM
DescriptionSeverityWeakness
Data Sourced
via Red Hat·05:02 AM
DescriptionSeverityAffected Software
Data Sourced
via NVD·05:16 AM
DescriptionSeverityWeakness
Jul 27, 2026
Data Sourced
via IBM·12:00 AM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is the severity of CVE-2026-40984?

CVE-2026-40984 has a high severity rating of 7.5.

2

How do I fix CVE-2026-40984?

To fix CVE-2026-40984, upgrade to the latest version of micrometer-core or its related dependencies.

3

What is the main risk associated with CVE-2026-40984?

The main risk of CVE-2026-40984 is a denial-of-service (DoS) condition caused by specially crafted HTTP requests.

4

Which versions are affected by CVE-2026-40984?

CVE-2026-40984 affects micrometer-core versions 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, and 1.9.0 through 1.9.17.

5

What components are impacted by CVE-2026-40984?

The components impacted by CVE-2026-40984 include micrometer-core and related artifacts such as micrometer-jetty11 and micrometer-jetty12.

Company

Resources

Contact

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