Vulnerability · Published Oct 26, 2026 · Assigned by HashiCorp
CVE-2026-105608Consul vulnerable to an authorization bypass in service mesh registration
High 8.8
In plain English
A high-severity security flaw in Consul from HashiCorp. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 39% of all known vulnerabilities).
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | consul | no fix listed | UBUNTU-CVE-2026-105608 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| HashiCorp | Consul | 2.0.4 – before 2.1.0 |
| HashiCorp | Consul Enterprise | 2.0.4 – before 2.1.0 |
Weakness: CWE-178 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H