CVE-2026-105608 — HIGH (8.8)

Vulnerability 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.

CVSS Score

8.8

HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-178

References

https://discuss.hashicorp.com/t/hcsec-2026-47-consul-vulnerable-to-an-authorizat

FAQ

What is CVE-2026-105608?

CVE-2026-105608 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 con...

How severe is CVE-2026-105608?

CVE-2026-105608 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-105608?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.