CVE-2026-105608

Consul vulnerable to an authorization bypass in service mesh registration

State: Published
Severity: 8.8 High
Published: Oct 26, 2026
Updated: Oct 26, 2026
Reserved: Oct 5, 2026

Description

HashiCorp Consul and Consul Enterprise are vulnerable to an authorization bypass in service mesh proxy registration. This may allow a user with service write permission to apply Envoy escape-hatch configuration without the required mesh write permission. This vulnerability (CVE-2026-105608) is fixed in Consul Community Edition 2.1.0 and Consul Enterprise 2.1.0 and 1.21.19.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	HashiCorp

Weaknesses

CWE-178 Improper Handling of Case Sensitivity

Affected Products

Product	Versions
ConsulHashiCorp	2.0.4 to before 2.1.0Affected
Consul EnterpriseHashiCorp	2.0.4 to before 2.1.0Affectedfrom 1.21.18Affectedfrom 1.21.19Not affectedfrom 1.22.12Affected

References

https://discuss.hashicorp.com/t/hcsec-2026-47-consul-vulnerable-to-an-authorization-bypass-in-service-mesh-registration/77912

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