What’s Vulnerable › Vulnerabilities

CVE-2021-32574

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-07-17 · updated 2026-06-17
• Weakness: CWE-295

Description

HashiCorp Consul and Consul Enterprise 1.3.0 through 1.10.0 Envoy proxy TLS configuration does not validate destination service identity in the encoded subject alternative name. Fixed in 1.8.14, 1.9.8, and 1.10.1.

Affected products

• HashiCorp Consul: from 1.3.0 before 1.8.14; from 1.9.0 before 1.9.8; from 1.10.0 before 1.10.1 — fixed in 1.10.1, 1.8.14, 1.9.8

How to fix

Upgrade to a fixed version: HashiCorp Consul 1.10.1, 1.8.14, 1.9.8. Check the vendor advisory for mitigations.

References

• https://discuss.hashicorp.com/t/hcsec-2021-17-consul-s-envoy-tls-configuration-did-not-validate-destination-service-subject-alternative-names/26856
• https://github.com/hashicorp/consul/releases/tag/v1.10.1
• https://security.gentoo.org/glsa/202208-09
• https://www.hashicorp.com/blog/category/consul
• https://discuss.hashicorp.com/t/hcsec-2021-17-consul-s-envoy-tls-configuration-did-not-validate-destination-service-subject-alternative-names/26856
• https://github.com/hashicorp/consul/releases/tag/v1.10.1
• https://security.gentoo.org/glsa/202208-09
• https://www.hashicorp.com/blog/category/consul

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