CVE-2026-87106 — Consul vulnerable to a denial of service in the native RPC listener

CVE-2026-87106

Consul vulnerable to a denial of service in the native RPC listener PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
HashiCorp / Consul	affected 1.21.0 before 2.0.4
HashiCorp / Consul Enterprise	affected 1.21.0 before 2.0.4

CWE

CWE-400

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.