Authorization Bypass Vulnerability in HashiCorp Consul and Consul Enterprise
CVE-2026-105765

7.5HIGH

Key Information:

Vendor

Hashicorp
Status
Consul
Consul Enterprise
Vendor
CVE Published:
26 October 2026

What is CVE-2026-105765?

HashiCorp Consul and Consul Enterprise versions 1.17.0 through 2.0.4 are susceptible to an authorization bypass vulnerability. This flaw exists within the agent's service mesh leaf certificate API, permitting attackers without a valid ACL token to retrieve a cached service leaf certificate and its associated private key. The vulnerability poses a significant security risk, as it may enable unauthorized access to sensitive information, potentially impacting the overall integrity of the system. It has been addressed in Consul Community Edition 2.1.0 and Consul Enterprise versions 2.1.0 and 1.21.19.

Affected Version(s)

Consul 64 bit 1.17.0 < 2.1.0

Consul Enterprise 64 bit 1.17.0 < 2.1.0

References

https://discuss.hashicorp.com/t/hcsec-2026-46-consul-vuln...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This issue was reported to HashiCorp by Tomas Castillo (https://github.com/muertostech).
.