# Micrometer HTTP server instrumentations DoS

Advisory record · `GHSA-g3pr-3p32-fp23`

- **Identifiers:** `GHSA-g3pr-3p32-fp23` · `CVE-2026-40984`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **Weakness (CWE):** [CWE-400](https://cwe.mitre.org/data/definitions/400.html) · [CWE-770](https://cwe.mitre.org/data/definitions/770.html)
- **Tags:** [Denial of service](https://agentprime.io/advisories/tag/dos.md)
- **Published:** 9 Jun 2026
- **Updated:** 11 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 9 Jun 2026, 06:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `io.micrometer:micrometer-core` (Maven): affected `>=1.16.0, <1.16.6 || >=1.15.0, <1.15.12 || >=1.14.0, <=1.14.14 || >=1.10.0, <=1.13.15 || <=1.9.17`; fixed in `1.16.6`, `1.15.12`
- `io.micrometer:micrometer-jetty12` (Maven): affected `>=1.16.0, <1.16.6 || >=1.15.0, <1.15.12 || >=1.14.0, <=1.14.14 || <=1.13.15`; fixed in `1.16.6`, `1.15.12`
- `io.micrometer:micrometer-jetty11` (Maven): affected `>=1.16.0, <1.16.6 || >=1.15.0, <1.15.12 || >=1.14.0, <=1.14.14 || <=1.13.15`; fixed in `1.16.6`, `1.15.12`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 7.5 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`, from CNA (vmware)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0079, the 56th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:16 UTC: First seen by agentprime
- 31 Oct 2026, 14:16 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-g3pr-3p32-fp23)

## Sources

- [GitHub Advisory Database: GHSA-g3pr-3p32-fp23](https://github.com/advisories/GHSA-g3pr-3p32-fp23)
- [OSV: GHSA-g3pr-3p32-fp23](https://osv.dev/vulnerability/GHSA-g3pr-3p32-fp23)
- <https://nvd.nist.gov/vuln/detail/CVE-2026-40984>
- <https://github.com/micrometer-metrics/micrometer/commit/36da131525228188a36779a28471a76c79213dd4>
- <https://access.redhat.com/errata/RHSA-2026:36839>
- <https://access.redhat.com/errata/RHSA-2026:37390>
- <https://access.redhat.com/errata/RHSA-2026:41951>
- <https://access.redhat.com/errata/RHSA-2026:50848>
- <https://access.redhat.com/errata/RHSA-2026:50849>
- <https://access.redhat.com/errata/RHSA-2026:54435>
- <https://access.redhat.com/errata/RHSA-2026:62260>
- <https://access.redhat.com/errata/RHSA-2026:66488>
- <https://access.redhat.com/errata/RHSA-2026:66545>
- <https://access.redhat.com/security/cve/CVE-2026-40984>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-g3pr-3p32-fp23>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

---

The web page: <https://agentprime.io/advisories/GHSA-g3pr-3p32-fp23/>. Everything for agents: <https://agentprime.io/llms.txt>.