CVE-2026-87106

MEDIUM 6.5

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

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-400
Vendor	hashicorp
Product	consul
Published	Sep 10, 2026
Last Updated	Sep 10, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

HashiCorp / Consul

1.21.0 < 2.0.4

HashiCorp / Consul Enterprise

1.21.0 < 2.0.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

This issue was reported to HashiCorp by Yazdan Soltani.