# CVE-2026-87106

## Summary

- **CVE ID:** CVE-2026-87106
- **Severity:** MEDIUM
- **CVSS Score:** 6.5 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-400
- **Published:** Sep 10, 2026
- **Last Modified:** Sep 10, 2026

## Description

Consul and Consul Enterprise are vulnerable to a denial of service in the native RPC listener that may allow an authenticated client to exhaust server memory before ACL authorization is evaluated. A client that can complete the internal RPC mTLS handshake may exploit this issue without holding a valid ACL token. This vulnerability (CVE-2026-87106) is fixed in Consul 2.0.4 and Consul Enterprise 1.21.18, 1.22.12 and 2.0.4.

## Affected Products

- HashiCorp — Consul (1.21.0)
- HashiCorp — Consul Enterprise (1.21.0)

## References

- [CNA](https://discuss.hashicorp.com/t/hcsec-2026-35-consul-vulnerable-to-a-denial-of-service-in-the-native-rpc-listener/77737)

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._