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

High severity · published Jun 9, 2026

CVE-2026-40984

Micrometer HTTP server instrumentations DoS vulnerability

7.5

CVSS

0.8%

EPSS

On KEV

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

None

Integrity

None

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.8% · higher than 56% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Micrometer · Spring

1.16.0 before 1.16.5.1; 1.15.0 before 1.15.11.1; 1.14.0 before 1.14.16; 1.13.0 before 1.13.19; 1.9.0 before 1.9.18; 1.16.0 before 1.16.5.1; +7 more · source: vendor

Red Hat AMQ Clients · Red Hat