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Vulnerability record · CVE-2021-37219 · published 7 September 2021

CVE-2021-37219: Hashicorp consul improper certificate validation vulnerability

Hashicorp · Consul

HashiCorp Consul and Consul Enterprise 1.10.1 Raft RPC layer allows non-server agents with a valid certificate signed by the same CA to access server-only functionality, enabling privilege escalation. Fixed in 1.8.15, 1.9.9 and 1.10.2.

8.8 CVSS 3.1 High EPSS 1.1% · top 34.4% CWE-295 · Improper certificate validation
8.8CVSS 3.1 base score, v2 6.5
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

HashiCorp Consul and Consul Enterprise 1.10.1 Raft RPC layer allows non-server agents with a valid certificate signed by the same CA to access server-only functionality, enabling privilege escalation. Fixed in 1.8.15, 1.9.9 and 1.10.2.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://discuss.hashicorp.com/t/hcsec-2021-22-consul-raft-rpc-privilege-escalation/29024 Vendor Advisory
https://security.gentoo.org/glsa/202207-01 Third Party Advisory
https://www.hashicorp.com/blog/category/consul ProductVendor Advisory
https://discuss.hashicorp.com/t/hcsec-2021-22-consul-raft-rpc-privilege-escalation/29024 Vendor Advisory
https://security.gentoo.org/glsa/202207-01 Third Party Advisory
https://www.hashicorp.com/blog/category/consul ProductVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-37219), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.