CVE-2026-87106: 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…

PriorityP337medium6.5CVSS 3.1

AVNACLPRLUINSUCNINAH

EPSS

0.41%

34.2th percentile

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

2 ranges

Vendor	Product	Version range	Fixed in
hashicorp	consul	>= 1.21.0 < 2.0.4	2.0.4
hashicorp	consul_enterprise	>= 1.21.0 < 2.0.4	2.0.4

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