PatchSiren cyber security CVE debrief

CVE-2026-40983 Spring CVE debrief

A vulnerability in Micrometer, identified as CVE-2026-40983, allows for specially crafted gRPC requests that may cause a denial-of-service (DoS) condition. The affected versions are Micrometer 1.16.0 through 1.16.5 and 1.15.0 through 1.15.11. This vulnerability has a CVSS score of 7.5 and is classified as HIGH severity.

Vendor: Spring
Product: Micrometer
CVSS: HIGH 7.5
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-09
Original CVE updated: 2026-06-09
Advisory published: 2026-06-09
Advisory updated: 2026-06-09

Who should care

Users of Micrometer versions 1.16.0 through 1.16.5 and 1.15.0 through 1.15.11 should be aware of this vulnerability and take necessary actions to mitigate the risk.

Technical summary

The vulnerability is caused by the possibility of a user providing specially crafted gRPC requests that may cause a denial-of-service (DoS) condition in Micrometer.

Defensive priority

HIGH

Recommended defensive actions

Update Micrometer to a version that is not affected by this vulnerability.
Implement measures to detect and prevent specially crafted gRPC requests.

Evidence notes

The CVE record and NVD detail can be found at [cve-org] and [nvd], respectively. Additional information can be found at [ref-4].

Official resources

CVE-2026-40983 was published on 2026-06-09T05:16:34.653Z and modified on 2026-06-09T13:49:39.993Z.