# CVE-2026-40984

## Summary

- **CVE ID:** CVE-2026-40984
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-400
- **Published:** Jun 9, 2026
- **Last Modified:** Sep 14, 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.

## Affected Products

- Spring — Micrometer (1.16.0)
- Spring — Micrometer (1.15.0)
- Spring — Micrometer (1.14.0)
- Spring — Micrometer (1.13.0)
- Spring — Micrometer (1.9.0)

## References

- [CNA](https://spring.io/security/cve-2026-40984)
- [redhat-SADP](https://access.redhat.com/security/cve/CVE-2026-40984)
- [redhat-SADP](https://bugzilla.redhat.com/show_bug.cgi?id=2486716)
- [redhat-SADP](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40984.json)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:36839)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:37390)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:41951)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:50849)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:50848)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:54435)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:62260)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:66545)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:66488)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.79%
- **EPSS Percentile:** 54.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._