CVE-2026-19015 Uncontrolled resource consumption in the Consul Connect CA roots endpoint
Remote attackers can exhaust resources in Consul Connect CA roots cache, causing denial of service for operators.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-19015?
CVE-2026-19015 is a medium-severity denial of service vulnerability in HashiCorp Consul, published on 7 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Consul Community Edition and Consul Enterprise 1.2.0 through 2.0.2 are vulnerable to an uncontrolled resource consumption issue in the Connect CA roots endpoint that may allow a remote caller to grow the agent's Connect CA roots cache without bound, defeating the operator's cache-disable configuration. This vulnerability, CVE-2026-19015, is fixed in Consul 2.0.3 and Consul Enterprise 1.21.17, 1.22.11, and 2.0.3.
Weakness: CWE-770
Which versions are affected by CVE-2026-19015?
1 open source package ship an affected version, including consul.
| Package | Affected | Fixed in |
|---|---|---|
consul Bitnami | From 1.2.0 | 2.0.3 |
How do I fix CVE-2026-19015?
Upgrade consul to 2.0.3 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-19015 being exploited?
There is no known exploitation of CVE-2026-19015 in the wild and no public exploit code.
Sources
Also known as BIT-consul-2026-19015, DEBIAN-CVE-2026-19015, GHSA-hhvm-wg9j-9rp7, MINI-mcxc-57qj-f9f5, MINI-wrr7-wfq4-gr3v, UBUNTU-CVE-2026-19015.