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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| HashiCorp | Consul | 1.18.0 – < 2.0.3 | 2.0.3 |
| HashiCorp | Consul Enterprise | 1.18.0 – < 2.0.3 | 2.0.3 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 11 | consul | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | consul | No fix yet | — |
| Ubuntu 20.04 LTS | consul | No fix yet | — |
| Ubuntu 18.04 LTS | consul | No fix yet | — |