CVE-2026-40984

Micrometer HTTP server instrumentations DoS vulnerability

State: Published
Severity: 7.5 High
Published: Jun 9, 2026
Updated: Sep 14, 2026
Reserved: Apr 16, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	vmware
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	redhat-SADP

Weaknesses

CWE-400 Uncontrolled Resource Consumption
CWE-770 Allocation of Resources Without Limits or Throttling

Affected Products

Product	Versions
MicrometerSpring	1.16.0 to before 1.16.5.1Affected 1.15.0 to before 1.15.11.1Affected 1.14.0 to before 1.14.16Affected 1.13.0 to before 1.13.19Affected 1.9.0 to before 1.9.18Affected
MicrometerSpring	1.16.0 to before 1.16.5.1Affected 1.15.0 to before 1.15.11.1Affected 1.14.0 to before 1.14.16Affected 1.13.0 to before 1.13.19Affected
MicrometerSpring	1.16.0 to before 1.16.6Affected 1.15.0 to before 1.15.11.Affected 1.14.0 to before 1.14.15.1Affected 1.13.0 to before 1.13.19Affected

References

https://spring.io/security/cve-2026-40984
https://access.redhat.com/security/cve/CVE-2026-40984vdb-entry
RHBZ#2486716issue-tracking
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40984.json
https://access.redhat.com/errata/RHSA-2026:50849vendor-advisory
https://access.redhat.com/errata/RHSA-2026:66545vendor-advisory
https://access.redhat.com/errata/RHSA-2026:66488vendor-advisory
https://access.redhat.com/errata/RHSA-2026:36839vendor-advisory
https://access.redhat.com/errata/RHSA-2026:41951vendor-advisory
https://access.redhat.com/errata/RHSA-2026:62260vendor-advisory
https://access.redhat.com/errata/RHSA-2026:37390vendor-advisory
https://access.redhat.com/errata/RHSA-2026:50848vendor-advisory
https://access.redhat.com/errata/RHSA-2026:54435vendor-advisory

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