Vulnerability · Published Aug 7, 2026 · Assigned by HashiCorp
CVE-2026-19012Authenticated denial of service in Consul Enterprise-to-Community Edition downgrade path
Medium 5.3
In plain English
A medium-severity null pointer dereference 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 0.3% (higher than 26% of all known vulnerabilities).
Official description
Consul Community Edition and Consul Enterprise 1.18.0 through 2.0.2 are vulnerable to an authenticated denial of service in the Enterprise-to-Community Edition downgrade path that may allow an authorized caller to crash the Consul server. A caller with config-entry write permission can submit a service-router configuration entry that causes the agent to exit unexpectedly. This vulnerability, CVE-2026-19012, is fixed in Consul 2.0.3 and Consul Enterprise 1.21.17, 1.22.11, and 2.0.3.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | consul | no fix listed | UBUNTU-CVE-2026-19012 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| HashiCorp | Consul | 1.18.0 – before 2.0.3 |
| HashiCorp | Consul Enterprise | 1.18.0 – before 2.0.3 |
Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H