CVE-2026-40984: Micrometer HTTP server instrumentations DoS
(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.
References
- access.redhat.com/errata/RHSA-2026:36839
- access.redhat.com/errata/RHSA-2026:37390
- access.redhat.com/errata/RHSA-2026:41951
- access.redhat.com/errata/RHSA-2026:50848
- access.redhat.com/errata/RHSA-2026:50849
- access.redhat.com/errata/RHSA-2026:54435
- access.redhat.com/errata/RHSA-2026:62260
- access.redhat.com/errata/RHSA-2026:66488
- access.redhat.com/errata/RHSA-2026:66545
- access.redhat.com/security/cve/CVE-2026-40984
- bugzilla.redhat.com/show_bug.cgi?id=2486716
- github.com/advisories/GHSA-g3pr-3p32-fp23
- github.com/micrometer-metrics/micrometer/commit/36da131525228188a36779a28471a76c79213dd4
- nvd.nist.gov/vuln/detail/CVE-2026-40984
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40984.json
- spring.io/security/cve-2026-40984
Code Behaviors & Features
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