CVE-2026-105608

HIGH 8.8

Consul vulnerable to an authorization bypass in service mesh registration

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-178
Vendor	hashicorp
Product	consul
Published	Oct 26, 2026
Last Updated	Oct 26, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

HashiCorp / Consul

2.0.4 < 2.1.0

HashiCorp / Consul Enterprise

2.0.4 < 2.1.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

This issue was reported to HashiCorp by Immad Sahin of ZeroTrail and Yonghwa Lee of Theori.